摘要
利用木薯光系统Ⅱ(PSII)最大光化学效率(Fv/Fm)量化木薯受到干旱胁迫的程度,并测量木薯叶片与离层的内源乙烯在不同程度干旱胁迫下的量,以探讨内源乙烯的产生、Fv/Fm的下降速度与木薯抗旱性之间的关系。结果表明,抗旱性越强的品种,Fv/Fm下降速度越慢,内源乙烯上升的时间也越靠后。
To quantify the level of cassava drought stress, cassava Photosystem II （PSII） maximal photochemical efficiency （Fv/Fm） has been used in this study. At the same time, we measured the content changes of endogenous ethylene in cassava leaves and abscission zones under varying drought stress. We aim to determine by analyzing the present experiment results, the relationships between drought resistance of cassava, the production of endogenous ethylene, and the rate of decline in Fv/Fm value. Our results showed that cassava varieties with later ethylene emission and slowly decreasing Fv/Fm are more tolerant to drought.
出处
《热带农业科学》
2012年第4期10-12,16,共4页
Chinese Journal of Tropical Agriculture
基金
973计划"重要热带作物木薯品种改良的基础研究"(No.2010CB126602)
中央级公益性科研院所基本科研业务费专项(No.ITBBZX110103)
关键词
木薯
内源乙烯
FV/FM
离层
cassava
endogenous ethylene
Fv/Fm
abscission zone
