期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

2007

33

6

700-704

10.13331/j.cnki.jhau.2007.06.023

国家研究与开发专项基金项目（JY04-B-02）；

本校为第一机构

以即将落叶的2年生枳(Poncirus trifoliata (L.)Raf.)营养袋苗为试材,以相同时期的2年生宫本/枳砧(Citrus reticulata Blanco cv.Miyamoto)营养袋苗为对照,棉絮包蔸进行-6 ℃不同时间的低温处理,探讨枳在落叶前的抗寒能力.结果表明,枳叶片电解质渗出率随-6 ℃处理时间的延长呈"S"形变化,当电解质渗出率在25%以下时,叶片受冻可以恢复;当叶片电解质渗出率在50%以上时,叶片发生不可逆冻害,2～3 d干枯、死亡,与受冻形态观察结果吻合.枳落叶前-6 ℃处理60 min是耐受低温的临界点.枳抗寒能力强于宫本的因素之一可能是枳的过氧化氢酶和过氧化物酶活性比宫本高.枳经历了秋季日照缩短和气温降低的低温锻炼...

To analyze the cold tolerance of Poncirus trifoliate（L. ） Raf. , potted two-year-old seedlings before abscission period were exposed to -6℃ for different times using improved temperature-controlled refrigerator, using potted two-year-old grafted plants of Miyamoto satsuma mandarin before abscission period as control. ‘S’ type of leaf electrolytes leakage was observed. Spring leaves were not injured by the coldness when leaf electrolytes leakage was lower than 25% bet frozen to death after 2-3 days shrivelling when the leaf electrolytes lea...