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Response of root morphology, physiology and endogenous hormones in maize (Zea mays L.) to potassium deficiency

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文献类型：外文期刊

作者： Zhao Xin-hue ¹ ; Yu Hai-qiu ¹ ; Wen Jing ¹ ; Wang Xiao-guang ¹ ; Du Qi ¹ ; Wang Jing ¹ ; Wang Qiao ¹ ;

作者机构： 1.Shenyang Agr Univ, Coll Agron, Shenyang 110866, Peoples R China

2.Jilin Acad Agr Sci, Agrobiotechnol Res Inst, Changchun 130124, Peoples R China

关键词： potassium deficiency;maize;root morphology;physiological variation;endogenous hormone

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （影响因子：2.848；五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2016 年 15 卷 4 期

页码：

收录情况： SCI

摘要： Potassium (K) deficiency is one of the major abiotic stresses which has drastically influenced maize growth and yield around the world. However, the physiological mechanism of K deficiency tolerance is not yet fully understood. To identify the differences of root morphology, physiology and endogenous hormones at different growing stages, two maize inbred lines 90-21-3 (tolerance to K deficiency) and D937 (sensitive to K deficiency) were cultivated in the long-term K fertilizer experimental pool under high potassium (+K) and low potassium (K) treatments. The results indicated that the root length, volume and surface area of 90-21-3 were significantly higher than those of D937 under K treatment at different growing stages. It was noteworthy that the lateral roots of 90-21-3 were dramatically higher than those of D937 at tasselling and flowering stage under K treatment. Meanwhile, the values of superoxide dismutase (SOD) and oxidizing force of 90-21-3 were apparently higher than those of D937, whereas malondialdehyde (MDA) content of D937 was obviously increased. Compared with +K treatment, the indole-3-acetic acid (IAA) content of 90-21-3 was largely increased under K treatment, whereas it was sharply decreased in D937. On the contrary, abscisic acid (ABA) content of 90-21-3 was slightly increased, but that of D937 was significantly increased. The zeatin riboside (ZR) content of 90-21-3 was significantly decreased, while that of D937 was relatively increased. These results indicated that the endogenous hormones were stimulated in 90-21-3 to adjust lateral root development and to maintain the physiology function thereby alleviating K deficiency.

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Response of root morphology, physiology and endogenous hormones in maize (Zea mays L.) to potassium deficiency

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Response of root morphology, physiology and endogenous hormones in maize (Zea mays L.) to potassium deficiency

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