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The Effects of Low Phosphorus Stress on Morphological and Physiological Characteristics of Maize （Zea mays L.） Landraces

ISSN号：1002-0470
期刊名称：《高技术通讯》
时间：0
分类：S513[农业科学—作物学]
作者机构：[1]Maize Research Institute, Sichuan Agricultural University, Yaan 625014, P.R.China, [2]Department of Life Science, Changjiang Normal College, Fuling 408003, P.R.China
相关基金：Acknowledgements This work was supported by the National High Technology Research and Development Program of China （863 Program, 2004BA525B04）, and the Program for Changjiang Scholars and Innovative Research Team in University of China （IRT0453）.

作者： YAO Qi-lun[1,2], YANG Ke-cheng[1], PAN Guang-tang[1], RONG Ting-zhao[1]

关键词：玉米, 地方品种, 低磷胁迫, 形态特性, 生理特性, maize, landraces, P-deficiency, low-P stress, morphology, physiology

中文摘要：

田间试验被进行调查主要词法并且到在幼苗的阶段的 low-P 应力的不同玉米陆地赛跑的生理变化。P 缺乏显著地减少了根体积，全部的叶面积，和植物弄干重量，而是根毛和根顶比率的极大地增加的密度。另外， P 缺乏导致了效率和脯氨酸， malondialdehye (MDA ) ，酸性磷酸酶(APase ) ，过氧化物酶(邮政部门) 和超级氧化物 dismutase (草皮) 的数量，而是 P 举起和 soluable 蛋白质的重要减小满足的磷利用的重要改进。自从 P 缺乏， P 容忍的玉米上的有的更小的效果作为与 P 敏感的陆地赛跑 DP-29 和 DP-24 相比打赛跑 DP-44， DP-32 和 DP-33，到 P 缺乏的忍耐的差别在不同玉米陆地赛跑之中存在，这被表明。基于显示出的相关分析，经济玉米土地让步，这跑的结果在 P 缺乏下面与他们的词法、生理的特征有关系。

英文摘要：

A field trial was conducted to investigate main morphological and physiological changes of different maize landraces to low-P stress at the stage of seedling. P-deficiency significantly decreased root volume, total leaf area, and plant dry weight, but greatly increased density of root hairs and root top ratio. In addition, P-deficiency induced the significant enhancement of phosphorus utilization efficiency and the amount of proline, malondialdehye （MDA）, acid phosphatase （APase）, peroxidase （POD） and superoxide dismutase （SOD）, but the significant reduction of P uptake and soluable protein content. Since P-deficiency had smaller effects on the P-tolerant maize landraces DP-44, DP-32 and DP-33 as compared with P-sensitive landraces DP-29 and DP-24, it was demonstrated that differences of tolerance to P-deficiency existed among different maize landraces. The results based on the correlation analysis showed that the economic yield of maize landraces had relationships with their morphological and physiological characteristics under P-deficiency.

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