中国水稻科学
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  2004, Vol. 18 Issue (2): 109-112     DOI:
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Freezing Tolerance and Germination Ability at Low Temperature of Dandong Weedy Rice
CHEN Hui-zhe; XUAN Song-nan; WANG Wei-xia; SHAO Guo-sheng; SUN Zong-xiu
State Key Laboratory of Rice Biology; China National Rice Research Institute; Hangzhou 310006; China
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Abstract In order to understand why the weedy rice seeds could survive in field under winter conditions, dry seeds of Dandong weedy rice and rice cultivar Roshihikari were soaked in water for several hours, then transferred to -20℃ and stored for seven days, finally geminated under 25 ℃ condition. The germination rate of the control, Koshihikari, was dramatically reduced from 98 0% to 4.0% after soaking for one hour, and no seedlings could survive if soaking time was extended to 1.5 hours, while the seeds of Dandong weedy rice geminated normally after one hour soaking, and its seedling survival rate was up to 2.3% even soaked for three hours. Dandong weedy rice could germinate at 11℃, its critical temperature for germination was lower than that of the control. The potential values of the tolerance of weedy rice to freeze were discussed.
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Articles by authors
CHEN Hui-zhe
XUAN Song-nan
WANG Wei-xia
SHAO Guo-sheng
SUN Zong-xiu
Key wordsweedy rice   freezing tolerance   low temperature   germination     
Received: 1900-01-01;
Cite this article:   
CHEN Hui-zhe,XUAN Song-nan,WANG Wei-xia et al. Freezing Tolerance and Germination Ability at Low Temperature of Dandong Weedy Rice [J]. , 2004, 18(2): 109-112 .
 
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