Effects of Root Zone Warming on Maize Seedling Growth and Photosynthetic Characteristics Under Different Phosphorus Levels.
Effects of Root Zone Warming on Maize Seedling Growth and Photosynthetic Characteristics Under Different Phosphorus Levels.
复制标题
不同磷水平下根区增温对玉米幼苗生长及光合特性的影响
DOI：
10.3389/fpls.2021.746152
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发表时间：
2021
影响因子：
5.6
通讯作者：
Lu H
中科院分区：
文献类型：
--
作者：
Xia Z;Zhang S;Wang Q;Zhang G;Fu Y;Lu H
磷含量和根区温度是影响玉米生长的两个主要环境因子。低磷和根区高温胁迫均显著影响玉米生长，但缺磷和根区增温的综合效应研究较少。探讨缺磷和根区变暖对玉米幼苗根系吸收能力、总磷含量和光合荧光参数的影响。结果表明，玉米地上部和根系对根区增温和缺磷有不同的反应。适当提高根区温度有利于玉米幼苗的生长，但当根区温度过高时，显著影响玉米幼苗的根冠发育。根区增温对根系的影响较为显著，而缺磷对地上部的影响较大。磷含量与根区增温有较强的交互作用。在正常供磷和根区中温的综合影响下，玉米幼苗生长最好。在根区低磷和高温的联合作用下，生长最差。低磷根区高温处理比常规磷和根区中温处理的干物质减少55.80%。在低磷条件下，过高的根区温度降低了根系活力、植株含磷量，进而影响植株生长和光能利用效率。在磷肥供应充足的情况下，适当提高根区土壤温度，有利于增加植物对磷的吸收和利用，促进玉米幼苗的生长发育。
Phosphorus content and root zone temperature are two major environmental factors affecting maize growth. Both low phosphorus and root zone high temperature stress significantly affect the growth of maize, but the comprehensive effects of phosphorus deficiency and root zone warming are less studied. This study aimed to explore the effects of phosphorus deficiency and root zone warming on the root absorption capacity, total phosphorus content, and photosynthetic fluorescence parameters of maize seedlings. The results showed that maize shoots and roots had different responses to root zone warming and phosphorus deficiency. Properly increasing the root zone temperature was beneficial to the growth of maize seedlings, but when the root zone temperature was too high, it significantly affected the root and shoot development of maize seedlings. The root zone warming had a more significant impact on the root system, while phosphorus deficiency had a greater impact on the shoots. Phosphorus content and root zone warming had a strong interaction. Under the comprehensive influence of normal phosphorus supply and medium temperature in the root zone, the growth of maize seedlings was the best. Under the combined effects of low phosphorus and high temperature in the root zone, the growth was the worst. Compared with the combination of normal phosphorus and root zone medium temperature treatment, the dry mass of the low-phosphorus root zone high temperature treatment was decreased by 55.80%. Under the condition of low-phosphorus too high root zone temperature reduced root vitality, plant phosphorus content, which in turn affected plant growth and light energy utilization efficiency. In the case of sufficient phosphate fertilizer supply, appropriately increasing the soil temperature in the root zone is beneficial to increase the absorption and utilization of phosphorus by plants and promote the growth and development of maize seedlings.
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影响因子：
6.6
作者：
Liebthal M;Maynard D;Dietz KJ
通讯作者：
Dietz KJ
影响因子：
5.7
作者：
Foyer CH
通讯作者：
Foyer CH
影响因子：
7.3
作者：
JACOB, J;LAWLOR, DW
通讯作者：
LAWLOR, DW
影响因子：
3
作者：
Song, Yushuang;Li, Jinlu;Sui, Na
通讯作者：
Sui, Na
影响因子：
7.4
作者：
Richardson, Alan E.;Simpson, Richard J.
通讯作者：
Simpson, Richard J.