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Acta Agron Sin ›› 2006, Vol. 32 ›› Issue (07): 1044-1048.

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Effects of High Temperature Stress on ATPase Activity of Plasma Membrane and NH4+ Absorption Rate in Roots of Early Rice

SHI Qing-Hua,LI Mu-Ying,XU Jing-Biao,TAN Xue-Ming   

  1. College of Agronomy, Jiangxi Agricultural University, Key Laboratory of Crop Physiology, Ecology and Genetic Breeding of Jiangxi Province, Nanchang 330045, Jiangxi China
  • Received:2005-08-15 Revised:1900-01-01 Online:2006-07-12 Published:2006-07-12

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Abstract:

Cultivars of early rice with heat resistance: Nongda 228 and 082, and those with heat sensitivity: Molizhan and Xeiqingzao B were used to study the ATPase activity of plasma membrane and NH4+ absorption rate in roots under high temperature stress. The results indicated that under high temperature stress, H+-ATPase and Ca2+-ATPase activities of plasma membrane were increased in roots of Nongda 228 and 082 while declined in roots of Molizhan and Xeiqingzao B, with significant differences between them by Duncan’s method test. The protein content in all cultivars declined under high temperature stress. The NH4+ absorption rate had no change in the cultivars with heat resistance but declined in the cultivars with heat sensitivity under high temperature.

Key words: Early rice, Plasma membrane of roots, High temperature stress, ATPase activity

CLC Number: 

  • S511
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