Response of root morphology, physiology and endogenous hormones in maize (Zea mays L.) to potassium defi ciency
查看参考文献62篇
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文摘
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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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来源
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Journal of Integrative Agriculture
,2016,15(4):785-794 【核心库】
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DOI
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10.1016/S2095-3119(15)61246-1
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关键词
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potassium deficiency
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maize
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root morphology
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physiological variation
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endogenous hormone
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地址
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College of Agronomy, Shenyang Agricultural University, Shenyang, 110866
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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2095-3119 |
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学科
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农作物 |
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基金
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supported by the Program for Liaoning Excellent Talents in University, China
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国家自然科学基金
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the Tianzhu Mountian Scholars Support Plan of Shenyang Agricultural University, China
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文献收藏号
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CSCD:5686293
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