Morphological and physiological responses of Spatholobus suberectus Dunn to nitrogen and water availability
文献类型： 外文期刊
第一作者： Zhang, Z. -X.
作者： Zhang, Z. -X.;Zhang, J.;Liu, G. -Z.;Gao, L. -L.;Cai, C. -T.;Zhang, Z. -X.;Zhang, J.;Zhang, J.;Gong, Y.;Zhang, P.;Cai, C. -T.
作者机构：
关键词： fertilizer; gas exchange; nitrogen-use efficiency; water-use efficiency; water stress
期刊名称：PHOTOSYNTHETICA （ 影响因子：3.189； 五年影响因子：3.38 ）
ISSN： 0300-3604
年卷期： 2019 年 57 卷 4 期
页码：
收录情况： SCI
摘要： A pot study was conducted to elucidate morphological and physiological responses of Spatholobus suberectus Dunn accessions to four nitrogen application rates (0, 10, 20, and 30 mmol L-1) and two watering regimes (daily irrigation and irrigation every 10 d for a month). The results showed that water deficit led to marked decreases in leaf water relations and photosynthetic parameters regardless of the N treatments. Under drought conditions, the reductions in net photosynthesis occurred mainly due to stomatal factors. Although the leaf N content and stem mass ratio were positively correlated with N application, other morphological and physiological characteristics were negatively correlated or nonsignificantly correlated with N application under limited water supply. As the root nodules of S. suberectus can provide sufficient N supply, and high N applications made S. suberectus plants more vulnerable to drought stress, we suggest that no N supplement is required for S. suberectus seedlings.
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