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不同强度的连续触摸式机械刺激对水稻生理特性的影响

梁开明1,2,章家恩1,2,3**,黄兆祥1,全国明1,4,赵本良1,2,3   

  1. (1华南农业大学农学院生态学系, 广州 510642; 2华南农业大学农业部热带农业环境重点实验室, 广州 510642; 3华南农业大学广东省高等学校农业生态与农村环境重点实验室, 广州 510642; 4广州城市职业学院城市建设工程系, 广州 510405)
  • 出版日期:2013-08-10 发布日期:2013-08-10

Effects of prolonged mechanical stimulation with different intensities on rice plant physiological characters.

LIANG Kai=ming1,2, ZHANG Jia-en1,2,3**, HUANG Zhao-xiang1, QUAN Guo-ming1,4, ZHAO Ben-liang1,2,3   

  1. (1 Department of Ecology, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; 2Key Laboratory of AgroEnvironment in the Tropics, Ministry of Agriculture, Guangzhou 510642, China; 3Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, Guangzhou 510642, China; 4Department of Urban Construction Engineering, Institute of Guangzhou City Polytechnic, Guangzhou 510405, China)
  • Online:2013-08-10 Published:2013-08-10

摘要: 通过室内实验研究了触摸式机械刺激对水稻生理特性的影响。结果表明:机械刺激能降低水稻叶片的质膜透性,但随着处理时间的延长以及刺激强度的增加,质膜透性呈上升趋势;各强度的机械刺激处理均能提高水稻叶绿素a含量,并不同程度地降低叶绿素b含量;轻度机械刺激提高了水稻叶片的过氧化物酶(POD)、超氧化物歧化酶(SOD) 和多酚氧化酶(PPO)活性;随着处理时间的延长,各强度的机械刺激处理均能降低叶片吲哚乙酸(IAA)含量,提高脱落酸(ABA)含量及水稻的根系活力。结果表明,机械刺激可能是引起水稻生理特性及形态发生变化的重要因素之一。这些结论可为深入研究鸭稻共作系统中鸭子机械刺激对水稻生长性状的影响及作用机制提供理论依据。

关键词: 黄梁木, 生物量, 污泥堆肥, 重金属

Abstract: A laboratory experiment was conducted to study the effects of mechanical stimulation on the physiological characters of rice plant. Mechanical stimulation decreased the permeability of rice leaf plasma membrane, but, with the increase of stimulation intensity and treatment time, the permeability presented an increasing trend. The leaf chlorophyll a (Chl-a) content was increased by mechanical stimulation treatments, while the leaf chlorophyll b (Chl-b) content presented a decreasing trend. Low intensity mechanical stimulation increased the activities of protective enzymes peroxidase (POD), superoxide dismutase (SOD), and polyphenol oxidase (PPO) in rice leaves. In mechanical stimulation treatments, the leaf 3indoleacetic acid (IAA) content was reduced with time, whereas the leaf abscisic acid (ABA) content and the root activity showed an opposite trend. These results indicated that mechanical stimulation could be one of the important reasons leading to the morphological and physiological variations of rice plant. The findings from this study could provide a theoretical basis to further study the effects and action mechanisms of mechanical stimulation on the rice plant growth in rice-duck farming system.

Key words: biomass, Neolamarckia cadamba, sewage sludge, heavy metal.