Contrasting Growth Patterns, Root Trait Plasticity, Phosphorus Uptake, and Antioxidant Responses in Maize Hybrids under Water and Phosphorus Deficiency

文献类型： 外文期刊

第一作者： Hussain, Hafiz Athar

作者： Hussain, Hafiz Athar;Zhang, Qingwen;Ain, Qurat ul;Hussain, Hafiz Athar;Zhang, Qingwen;Ain, Qurat ul;Hussain, Hafiz Athar;Ain, Qurat ul;Naqvi, Rubab Zahra;Ahmad, Muhammad;Imran, Asma;Hussain, Saddam;Hussain, Hafiz Athar;Uddin, Saleem;Atif, Rana Muhammad

作者机构：

关键词： Drought; P-deficiency; Root growth; ROS; Antioxidants; Osmolytes; Maize

期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.1； 五年影响因子：3.6 ）

ISSN： 0718-9508

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Phosphorus (P) uptake in plants is reduced under water deficiency, which negatively affects plant growth. However, interaction of soil moisture and P deficiency affects morpho-physiological and biochemical responses of plants is still little known. This study investigates the physiological and biochemical responses of maize hybrids under the interaction of moisture and P deficiency. Various levels of water (> 80% field capacity (FC), 60%FC, 40%FC) and phosphorus (P100, P50, P0) were applied to two maize hybrids. The shoot and root characteristics, and P contents in both cultivars were decreased under the interaction of water and P deficiency (60% and 40%FC with P50 or P0). The activities of superoxide dismutase (SOD), total protein, free proline, and total reducing sugar were increased with decreasing water and P-supply but response of peroxidase (POD) and catalase (CAT) remained inconsistent. The significant upregulation of ZmNAC111 was noted under 40%FC with P100 treatment, but no such effects were recorded under 100%FC under P treatments in both cultivars. The expression of ZmPHR1.1 and ZmPHR1.2 was increased with reducing P supply, but higher expression was observed at P0 at 60% and 40%FC, which indicates these are key genes for P-deficiency tolerance. Overall, P0 with 60% or 40%FC caused severe reductions in growth traits among P application levels, but 40%FC was most destructive with all levels of P-supply. These results would be helpful to understand drought and low P tolerance mechanisms of maize, and provide future directions for regulation of responsive genes for developing tolerant maize cultivars.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序