Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (21): 144-148.doi: 10.11924/j.issn.1000-6850.2014-2274

Special Issue: 生物技术

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Relationship Between Cold-resistance and Endogenous Hormone in Oil Palm

  

  • Received:2014-08-20 Revised:2015-06-29 Accepted:2015-05-25 Online:2015-07-28 Published:2015-07-28

Abstract: For studying the relationship between cold- resistance and endogenous hormones, temperature gradient was set artificially and Logistic equation was simulated to calculate the semilethal temperature of low temperature and identify cold-resistance, and EILAS technique was adopted to test the content of endogenous hormones in the process of natural cooling. The results showed that semilethal temperature of four tested varieties was -4.1℃(T1), -0.92℃(T2), -2.89℃(T3), 2.18℃(M1), respectively, the order of cold tolerance was T1> T3>T2>M1. In the whole process of natural temperature decrease, the content of IAA, GA, CTK and ABA of varieties T1, T2, T3 and M1 basically unchanged when the temperature decreased from 26℃ to 18℃, while when the temperature was below 18℃, IAA and ABA content increased, GA content increased slightly, CTK content decreased, and the change of ETH was irregular; ABA/CTK ratio increased, and the ratio of ABA, GA, CTK and ETH to IAA first increased and then decreased. Varieties with high cold resistance had high content of IAA and ABA, and high ratio of IAA/ABA, IAA/ETH, GA/ETH, CTK/ETH and ABA/ETH, which showed that the increase of the content of IAA and ABA of oil palm leaves could improve cold resistance.