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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (6): 1750-1758    DOI: 10.7522/j.issn.1000-694X.2013.00261
Biology and Soil     
Responses of Fruit Development and Endogenous Hormones Content of Greenhouse Grown Pepper to α-Naphthalene Acetic Acid in Desert Area
ZHANG Hong-ju1,2, ZHAO Huai-yong3, YU Ji-hua1, XU Yao-zhao4
1.College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China;
2.Agricultural and Bio-technical College, Hexi University, Zhangye 734000, Gansu, China;
3.Zhangye Extension Center for Agricultural Techniques, Zhangye 734000, Gansu, China;
4.Hexi Oasis Agricultural Institute, Zhangye 734000, Gansu, China
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Abstract  

Responses of fruit development and endogenous hormones content to α-NaNAA were studied to clarify the treatment effects of α-NaNAA on fruit accumulation rates of bell pepper plants (Long-jiao No.2). Results showed that foliar spraying α-NaNAA significantly increased fruit length, fruit diameter, pericarp thickness, fruit weight, and dry matter accumulation rate of pepper plants. Foliar spraying α-NAA accelerated growth rates of pepper fruit during early growth stages, shortened the fruit formation periods, and 20 to 30 days after spraying were the maximum fruit growing period. This significantly advanced the initial time when maximum fruit weight appeared and delayed the determinate time when fruit growth was ended. This made the fruit weight was significantly improved, especially at 35 mg·kg-1 α-NaNAA. Foliar spraying α-NaNAA made the fruit matured 10 days earlier than the control at the same levels of fruit weight. Sprayingα-NaNAA also significantly improved concentrations of foliar endogenous hormones such as abscisic acid (ABA), gibberellins (GA), and zeatins (ZR) while had no significant effect on averaged concentrations of indole acetic acid (IAA) during the fruit accumulation period. Correlation analysis showed that fruit weight per pepper plant was significantly positively correlated with the averaged concentrations of ABA, GA, IAA, and ZR during the fruit accumulation period.

Key words:  pepper      α-naphthalene acetic acid sodium      fruit accumulation      endogenous hormones     
Received:  20 May 2013      Published:  26 June 2013
ZTFLH:  S482.8  

Cite this article: 

ZHANG Hong-ju1,2, ZHAO Huai-yong3, YU Ji-hua1, XU Yao-zhao4. Responses of Fruit Development and Endogenous Hormones Content of Greenhouse Grown Pepper to α-Naphthalene Acetic Acid in Desert Area. JOURNAL OF DESERT RESEARCH, 2013, 33(6): 1750-1758.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00261     OR     http://www.desert.ac.cn/EN/Y2013/V33/I6/1750

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