| Changes of endogenous hormones contents of two different drought-tolerant Malus rootstocks in response to drought stress |
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| DOI：10.7606/j.issn.1000-7601.2012.05.18 |
| Key Words: drought endogenous hormones Malus rootstock |
| Author Name | Affiliation | | LIU Changhai | College of Horticulture, Northwest A&F University, Yangling Shaanxi 712100, China
State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling Shaanxi 712100, China | | ZHOU Shasha | College of Horticulture, Northwest A&F University, Yangling Shaanxi 712100, China
State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling Shaanxi 712100, China | | ZOU Yangjun | College of Horticulture, Northwest A&F University, Yangling Shaanxi 712100, China
State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling Shaanxi 712100, China | | LIANG Dong | College of Horticulture, Northwest A&F University, Yangling Shaanxi 712100, China
State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling Shaanxi 712100, China | | MA Fengwang | College of Horticulture, Northwest A&F University, Yangling Shaanxi 712100, China
State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling Shaanxi 712100, China |
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| Abstract: |
| We used two different drought tolerant Malus rootstocks, i.e., Malus prunifolia and M. hupehensis Reld, to study the effect of drought stress on the content changes of endogenous hormones, such as ABA, IAA, GAs and ZR in leaves and roots. The results showed that the content of endogenous hormones varied in both organs according to genotype, organ and different time points. Comprehensive analysis indicated that ABA, as signal material, which can inhibit growth, incre
ased significantly in M. prunifolia compared with that of M. hupehensis under drought condition, especially on day 7 and day 14. However, IAA, which can promote growth, decreased significantly in drought-tolerant rootstock M. prunifolia. Moreover, at most time points, drought tolerant rootstock M. prunifolia had higher values than that of drought-sensitive rootstock M. hupehensis in terms of GA
s and ZR contents. Different endogenous hormones contents and variation tendencies under drought stress probably play certain roles in influencing drought-tolerance in Malus. |
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