1744336 1593 1786354660 med24 Organ-specific and stage-dependent aboveground stoichiometric economics in Fargesia denudata 2026 Jul 21:17:1882972. 10.3389/fpls.2026.1882972 Introduction: Plant stoichiometric traits can indicate nutrient allocation and resource-use strategies, but their interpretation depends on organ identity and developmental stage. Fargesia denudata is a staple bamboo for giant pandas and an important clonal understory plant in subalpine forests. We examined how C, N, and P concentrations and their ratios are coordinated across aboveground organs and ontogeny, and how stage-specific stoichiometric economics is associated with environmental and community variables. Methods: Across 52 plots in Wanglang National Nature Reserve, including 37 plots with F. denudata, we measured stoichiometric traits in shoot culms and in mature culms, leaves, and twigs, together with topographic, soil, and community variables. Results: Stoichiometric coordination was modular and stage-specific, with limited independent within-organ coordination retained only in shoot culms and mature twigs, and cross-organ links suggesting that mature twigs acted as the main bridge between culms and leaves. PC1 axes generally separated N- and P-enriched stoichiometry from ratio-enriched stoichiometry, indicating comparable but developmentally reorganized stoichiometric-economic axes. Shoot culms occupied the nutrient-enriched, relatively acquisitive end of the axis, whereas mature culms shifted toward the ratio-enriched, more conservative end. Shoot-culm PC1 did not scale significantly into mature organ-level or integrated mature aboveground PC1, indicating developmental reorganization rather than direct continuity. In mature bamboo, aboveground stoichiometric economics was assembled through organ-specific contributions, with twigs forming the main link between culms and leaves. Plots with F. denudata occurred on steeper slopes and had higher soil C concentration than plots without F. denudata. Environmental and community associations were stage-dependent and were concentrated mainly in shoot culms. Elevation showed a significant positive total effect on shoot-culm PC1, corresponding to a shift toward a more conservative stoichiometric strategy along the elevational gradient. Mature aboveground PC1 showed a more limited pattern, with only a single correlation with soil pH. Discussion: These results suggest that stoichiometric strategies in F. denudata are shaped by organ-specific coordination, ontogenetic reorganization, and stage-dependent links with environmental and community conditions. Organ- and stage-specific stoichiometric indicators may inform bamboo resource assessment and giant panda habitat evaluation. Keywords: bamboo growth; clonal integration; ontogeny; organ modularity; staple bamboo; stoichiometric trait. Copyright © 2026 Qu, Liu and Liu. Front Plant Sci 1664-462X 1 School of Ecology and Nature Conservation, Beijing Forestry University, Beijing, China.2 Hebei Normal University, Shijiazhuang, China. Frontiers in plant science Qu C;Liu S;Liu Y; Chenhui Qu,Siyu Liu,Yanhong Liu 2026 密枝箭竹地上部分器官和生长阶段特异性化学计量经济学规律研究 42553206 地上化学计量经济学,毛竹,发育阶段依赖性 1642298 1590 1784699944 med24 carbon nitrogen,qilian mountains 2026 Jun 26;15(13):1014. 10.3390/biology15131014 0.05), the N:P ratio remained relatively constant, with no significant P limitation. This indicates that tree species regulate forest floor material quality through divergent nutrient utilization strategies, modulating nutrient cycling. This study provides a theoretical foundation for the ecological restoration and stand structure optimization of alpine forests. Keywords: Qilian Mountains; allometric relationship; ecological stoichiometry; forest floor material; nutrient limitation.]]> Biology (Basel) 2079-7737 1 School of Life Sciences, Qinghai Normal University, Xining 810008, China.2 College of Geographical Sciences, Qinghai Normal University, Xining 810008, China.3 Qilian Mountain Southern Slope Forest Ecosystem Research Station, Haidong 810500, China.4 Key Laboratory of Medicinal Animal and Plant Resources of Qinghai-Tibetan Plateau, Xining 810008, China.5 Team of Germplasm Resources Formation Mechanism and Utilization on the Qinghai-Tibetan Plateau, Xining 810008, China.6 Xining Botanical Garden, Xining 810008, China. Biology Yang X;Ji S;Xu J;Kong X;Qi Y;Zhang Y;Xie H;Yan J; Xukai Yang,Shuang Ji,Jiaxiang Xu,Xiaoping Kong,Yinglian Qi,Yue Zhang,Huichun Xie,Jiawei Yan 2026 祁连山南坡典型树种器官向林地有机物转化过程中碳、氮、磷的计量特征及氮磷的全彽数量关系 42450562 碳氮关系,氮磷关系,林地物质转化,祁连山 1602610 1588 1783918137 med24 doublesex gene,sex differentiation,embryonic development 2026 Jul 6. 10.1002/ps.71089 Background: Phytoseiulus persimilis is an effective biocontrol agent characterized by paternal genome elimination (PGE), an unusual reproductive system in which males eliminate the paternal genome during embryogenesis. However, the molecular mechanism underlying sex determination and reproductive regulation in this species remain poorly understood. Results: Transcriptome-based analyses identified two doublesex (dsx) homologs, Ppdsx1 and Ppdsx2, as candidate regulators of reproduction. Weighted gene co-expression network analysis (WGCNA) assigned Ppdsx2 to a pre-mating-associated co-expression module enriched for reproductive and signaling pathways. Functional analyses revealed clear divergence between the two genes. RNA interference (RNAi) of Ppdsx1 reduced the proportion of female offspring, whereas RNAi of Ppdsx2 induced sex reversal, developmental abnormalities, and impaired egg viability. Yeast two-hybrid and glutathione S-transferase (GST) pull-down assays further demonstrated interactions between Dsx proteins and vitellogenin (Vg)-derived fragments identified from a complementary DNA (cDNA) library screen, suggesting a previously unrecognized connection between sex determination and reproductive nutrient allocation. Conclusions: Ppdsx1 contributes to maintenance of the female developmental pathway, whereas Ppdsx2 represents a strong candidate component of the PGE-associated sex-determination cascade. The observed Dsx-Vg fragment interaction suggests a potential link between reproductive developmental programs and nutrient allocation pathways. These findings provide new insights into the molecular basis of sex determination and reproductive regulation in phytoseiid mites and establish a foundation for future studies on the coupling of reproductive development and resource allocation. © 2026 Society of Chemical Industry. Keywords: Phytoseiidae; paternal genome elimination; pull‐down assay; sex determination; yeast two‐hybrid. © 2026 Society of Chemical Industry. Pest Manag Sci 1526-4998 1 State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.2 Western Agricultural Research Center, Chinese Academy of Agricultural Sciences/National Center for Agricultural Bio-safety Sciences Northwest Center, Changji, China.3 Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Beijing, China.4 Academician Workstation of Agricultural High-tech Industrial Area of the Yellow River Delta, National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land, Dongying, China. Pest management science Cheng Y;Wang Z;Wang E;Xu X;Zhang B; Yuanyuan Cheng,Zhenhui Wang,Endong Wang,Xuenong Xu,Bo Zhang 2026 双性基因影响捕食螨Phytoseiulus persimilis的性别分化和胚胎发育 42410731 双性基因,性别分化,胚胎发育 1600976 1588 1783530946 med24 biochar application,silicon fertilizer,rice nutrient allocation,soil fertility,arg dissemination 2026 Jul 6:125192. 10.1016/j.envres.2026.125192 The restoration of soils contaminated by antibiotic resistance genes (ARGs) is essential for agricultural safety and human health. Although biochar and silicon (Si) fertilizer have been commonly applied individually as amendments for soil remediation and rice quality improvement, their combined effects remain unclear. Here, we systematically assessed the effects of the integrated application of biochar and Si fertilizer on rice nutrient uptake, soil properties, bacterial community structure and functions, and ARG abundance by conducting a 120-day pot experiment with four treatments: control (CK), 0.15 t ha-1 of Si fertilizer (SF), 3 t ha-1 of biochar (BC), and their combination (SC). The results showed that the combined treatment enhanced rice panicle length and promoted the translocation of Si and potassium to leaves, while altering the distribution of nitrogen and phosphorus in rice. In soil, co-application did not markedly alter pH, SOM, or most available nutrient levels, but significantly increased TN and TP contents. Moreover, the SC treatment resulted in the lowest abundances of detected ARGs and MGEs among all treatments. It also reshaped the bacterial community composition and functional profiles, including reduced abundance or functional contribution of key r-strategist genera associated with ARGs and nitrogen/phosphorus metabolism, such as Dinghuibacter and Roseomonas. Overall, the co-application of biochar and Si fertilizer improved rice nutrient supply, enhanced soil nutrient status, and mitigated the dissemination of ARGs. These findings provide a scientific basis for sustainable paddy field production and ARG risk management in paddy ecosystems. Keywords: Antibiotic resistance genes (ARGs); Biochar; Nitrogen/phosphorus metabolism; Rice; Silicon fertilizer; Soil bacterial community. Copyright © 2026. Published by Elsevier Inc. Environ Res 1096-0953 Environmental research Wang M;Li S;Xu H;Huang Q;Wang Z;Wang X;Ma J; Mei Wang,Shuai Li,Hongwei Xu,Qiying Huang,Zhenyu Wang,Xudong Wang,Jiawei Ma 2026 生物炭与硅肥的联合作用可增强水稻营养分配、土壤肥力并缓解稻田土壤中ARG的传播 42409096 生物炭施用,硅肥,水稻养分分配,土壤肥力,ARG传播 1593094 1588 1783483123 med24 basal endosperm transfer layer,nutrient allocation,maize seed filling 2026 Jul;127(1):e71029. 10.1111/tpj.71029 Plant J 1365-313X 1 State Key Laboratory of High-Efficiency Production of Wheat-Maize Double Cropping, CIMMYT-Henan Joint Center for Wheat and Maize Improvement, Collaborative Innovation Center of Henan Grain Crops, College of Agronomy, Henan Agricultural University, Zhengzhou, 450002, China. The Plant journal : for cell and molecular biology Chen H;Deng J;Wang Y;Guo J;Wu F;Shi D;Luan X;Lu Z;Ma Z;Wang Y;Lei J;Shen Q;Tang J;Wang G; Hongyu Chen,Jiajia Deng,Yuyu Wang,Jing Guo,Fan Wu,Dongsheng Shi,Xiaoyue Luan,Zihan Lu,Zhiyuan Ma,Yongyan Wang,Jie Lei,Qingwen Shen,Jihua Tang,Guifeng Wang 2026 2026 Jul HD-ZIP IV基因ZmHB118在玉米种子填充过程中基底胚乳转移层的形成和母体至子代营养分配中是必需的 42401200 基底胚乳转移层,营养分配,玉米籽粒灌浆 1585750 1588 1783438261 med24 wild emmer wheat,transcription factor,seed growth,nutrient allocation 2026 Jul 2. 10.1111/pce.70718 Plant Cell Environ 1365-3040 1 School of Plant Sciences and Food Security, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel.2 Institute of Evolution, University of Haifa, Haifa, Israel.3 The Institute of Cereal Crop Research, Tel Aviv University, Tel Aviv, Israel.4 Plant Sciences, Volcani Institute-Agricultural Research Organization, Gilat, Israel.5 Department of Fruit Tree Sciences, The Volcani Center ARO, Rishon LeZion, Israel.6 Bioinformatics Unit, Institute of Plant Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel.7 Department of Life Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel. Sharma D;Haber Z;Prusty MR;Avni R;Perez M;Ronen M;Kumar R;Shatil-Cohen A;Haboub P;Omer C;Kelly G;Aviv H;Doron-Faigenboim A;Moshe D;Jasinska W;Rosental L;Millet E;Sela H;Sperling O;Sharon A;Dub AM;Brotman Y;Sade N; Davinder Sharma,Zechariah Haber,Manas R Prusty,Raz Avni,Mijal Perez,Moshe Ronen,Rakesh Kumar,Arava Shatil-Cohen,Paz Haboub,Chen Omer,Gilor Kelly,Hadar Aviv,Adi Doron-Faigenboim,Din Moshe,Weronika Jasinska,Leah Rosental,Eitan Millet,Hanan Sela,Or Sperling, 2026 一个野生二粒小麦B3转录因子调控种子生长和养分分配 42393843 野生埃姆默小麦,转录因子,种子生长,营养分配 1537801 1586 1782581620 med24 nitrogen addition,phosphorus addition,nitrogen limitation 2026 Jun 11;15(12):914. 10.3390/biology15120914 root > stem; P content was in the order of root > stem > needle; and K content showed the pattern of stem > needle > root. Fertilization did not alter the above nutrient distribution patterns; it significantly influenced nutrient concentrations and stoichiometry. Single applications of nitrogen fertilizer had the most significant effect on nutrient content; compared with the unfertilized control, single nitrogen application increased needle N content by 1.13-fold. Combined nitrogen and phosphorus application preferentially promoted the accumulation of N relative to P in stems; specifically, under combined N-P treatment, stem N content increased by 1.11-fold while stem P content increased by 1.03-fold, indicating a greater relative increase in N. In terms of stoichiometric ratio, fertilization increased N:P, particularly in the root and needle; root N:P increased by 1.19-fold under T8 (0.8 g N + 3 g P) and needle N:P increased by 1.17-fold under T2 (3 g P alone), both indicating a mitigation of N limitation. Consistent with the nutrient content results, single nitrogen application exerted the greatest effect on stoichiometric ratio, followed by nitrogen and phosphorus combined application, and single phosphorus application had the least effect. These findings suggest that fertilization can alter nutrient allocation and stoichiometric relationships in Pinus yunnanensis, which may affect its growth and metabolic processes, but further studies are needed to link these changes to seedling growth. Keywords: Pinus yunnanensis; nitrogen and phosphorus fertilization; nutrient allocation; nutrient content; stoichiometric ratio.]]> Biology (Basel) 2079-7737 1 Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Southwest Forestry University, Ministry of Education, Kunming 650224, China.2 Key Laboratory of Biodiversity Conservation in Southwest China, State Forestry Administration, Southwest Forestry University, Kunming 650224, China. Biology Li N;Liao J;Su X;Li X;Cai N;Xu Y; Na Li,Jianzhen Liao,Xin Su,Xiyan Li,Nianhui Cai,Yulan Xu 2026 氮磷添加通过重塑器官特异性化学计量缓解云南松幼苗的氮限制 42345770 氮添加,磷添加,氮限制 1525986 1586 1782509119 med24 Abies fabri,elevational shifts,nutrient strategies,morphological foraging,enzymatic mining 2026 Jun 23. 10.1111/plb.70247 Plant Biol (Stuttg) 1438-8677 1 Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China.2 College of Ecology and Environment, Chengdu University of Technology, Chengdu, China.3 Key Laboratory of Natural Resource Coupling Process and Effects, Beijing, China. Plant biology (Stuttgart, Germany) Ji L;Hu Y;Lu X;Duan B; L Ji,Y Hu,X Lu,B Duan 2026 模式树金钱松的海拔格局位移：从形态觅食到酶化学提取 42333911 Fraser云杉,海拔迁移,营养策略,形态觅食,酶解开采 1489092 1584 1781899970 med24 interspecific interactions,survival strategies,tree-shrub plants,alpine treelines 2026 Jun 15:321:120372. 10.1016/j.ecoenv.2026.120372 Nitrogen (N) and phosphorus (P) are pivotal nutrients that support species diversity in plant communities. However, in nutrient-poor alpine treeline ecosystems, the mechanisms through which interspecific interactions among treeline plants regulate nitrogen uptake patterns, competitive capacity, and survival strategies across functional groups remain poorly understood. Using four plant communities in the alpine treeline of Sygera Mountain (southeastern Tibet) as study subjects, we employed in situ 15N labeling to quantify inorganic nitrogen uptake rates in the leaves, branches, and fine roots of the dominant species in these communities. We further clarified the survival strategies, directionality of interspecific interactions, and competitive strength of two key treeline plant species under conditions shaped primarily by interspecific interactions and mediated by natural environmental factors. The results revealed three key findings: (1) Water use efficiency (WUE) was higher in mixed communities than in monospecific communities. Both Juniperus saltuaria and Rhododendron nivale preferred nitrate nitrogen (NO3--N), and this preference increased in mixed communities for both species, with the increase in R. nivale substantially greater than that in J. saltuaria. (2) Within mixed communities, the inorganic nitrogen uptake rates of leaves, branches, and fine roots in R. nivale were significantly higher than those in J. saltuaria. Interspecific interactions exerted a facilitative effect on R. nivale but an inhibitory effect on J. saltuaria, and soil total phosphorus (TP) was identified as the key nutrient supporting their growth and survival. (3) Compared with pure J. saltuaria stands, J. saltuaria-dominated mixed communities allocated a higher proportion of nutrients to aboveground organs and therefore adopted an acquisitive nutrient strategy. In contrast, relative to pure R. nivale communities, mixed communities dominated by R. nivale preferentially translocated nutrients to root systems, reflecting a defensive and conservative nutrient allocation pattern. Overall, this study confirms that the interspecific relationships and nutrient strategies of J. saltuaria and R. nivale in the Sygera Mountain alpine treeline are consistent with the Competitive Exclusion Hypothesis, Facilitation Hypothesis, and Productivity-Nutrient Allocation Hypothesis. From physiological and ecological perspectives, this study elucidates the regulatory mechanisms shaping interspecific relationships among alpine treeline plants. The findings advance our understanding of how biological factors, particularly interspecific interactions, modulate treeline migration under climate warming and provide critical theoretical support for endangered species protection and ecological restoration in this high-altitude region. Keywords: (15)N in-situ labeling; Competition-facilitation effects; Interspecific interactions between trees and shrubs; Survival strategies; Treeline dynamics. Copyright © 2026. Published by Elsevier Inc. Ecotoxicol Environ Saf 1090-2414 Ecotoxicology and environmental safety Chen G;Guo L;Fu F;Zhang B;Liu Y;Li J;Zhang Y;Li Y;Zhang G;Li J; Ganggang Chen,Liangna Guo,Fangwei Fu,Bo Zhang,Yuzhuo Liu,Jietin Li,Yibo Zhang,Yi Li,Gengxin Zhang,Jiangrong Li 2026 种间相互作用改变树木灌木的生存策略并阻碍西藏东南部高山林线的上移：来自碳氧同位素和氮同位素的证据 42296918 种间相互作用,生存策略,树丛植物,高山林线 1488758 1584 1781897950 med24 pumpkin rootstock,mineral nutrient,fruit quality 2026 Jun 11:237:111479. 10.1016/j.plaphy.2026.111479 Rootstocks are commonly used in melon cultivation to mitigate biotic and abiotic stresses and improve fruit quality. However, the extent to which rootstocks influence nutrient allocation, growth dynamics, and fruit quality formation in the scion remains insufficiently understood. This study compared the effects of two pumpkin rootstocks (Tianzhen No. 1 and Sizhuang No. 12) on melon fruit quality by examining nutrient partitioning, sugar accumulation, hormonal balance, and expression of sugar metabolism-related genes. Compared with non-grafted plants, rootstock grafting enhanced plant growth and increased total N, P, and K uptake (mg plant-1) as well as tissue nutrient concentrations (mg g-1 DW) during vine growth and fruit maturation stages. Tianzhen No. 1 showed higher K distribution to the scion (97.6%) and greater fruit K accumulation (45.88 mg/g) than Sizhuang No. 12. Fruits grafted onto Tianzhen No. 1 also exhibited higher total soluble solids (15.96 °Brix) and soluble sugar contents, including glucose (18.28 mg g-1), fructose (20.20 mg g-1), and sucrose (144.25 mg g-1), whereas fruits grafted onto Sizhuang No. 12 showed higher firmness (4.18 kg cm-2) compared with Tianzhen No. 1-grafted fruits (3.07 kg cm-2). At fruit maturation, Tianzhen No. 1-grafted melons had higher ABA content (14.49 ng/g) and upregulated expression of sugar transporter genes (HT2, HT7, SWEET4, SWEET7) and genes encoding key metabolic enzymes (SPS1, NIN3) compared to Sizhuang No. 12. These observed associations suggest that rootstock-mediated differences in nutrient uptake may contribute to altered scion fruit quality metabolism. Overall, the findings provide insights into the physiological and molecular basis of rootstock-dependent variation in melon fruit quality and may contribute to the development of targeted rootstock selection strategies in melon breeding programs. Keywords: Cucumis melo; Fruit quality; Mineral nutrition; Phytohormones; Rootstock. Copyright © 2026 The Authors. Published by Elsevier Masson SAS.. All rights reserved. Plant Physiol Biochem 1873-2690 1 National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China.2 Department of Horticultural Sciences, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur, Pakistan.3 MARA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.4 National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China; Hubei Hongshan Laboratory, Wuhan, 430070, China. Electronic address: biezl@mail.hzau.edu.cn. Plant physiology and biochemistry : PPB Kaleem MM;Chen J;Song Y;Nawaz MA;Ateeq M;Mu X;Ashraf MA;Ahamd M;Huang Y;Cheng J;Bie Z; Muhammad Mohsin Kaleem,Jiazhen Chen,Yu Song,Muhammad Azher Nawaz,Muhammad Ateeq,Xiong Mu,Muhammad Atiq Ashraf,Maqbool Ahamd,Yuan Huang,Jintao Cheng,Zhilong Bie 2026 砧木驱动的矿质营养再分配调控西瓜果实品质变异 42296583 南瓜砧木,矿物营养,果实品质