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Int J Mol Sci

Title:		Leaf Volatile Compounds and Associated Gene Expression during Short-Term Nitrogen Deficient Treatments in Cucumis Seedlings
Author(s):		Deng J; Yu HJ; Li YY; Zhang XM; Liu P; Li Q; Jiang WJ;
Address:		"Key Laboratory of Horticultural Crops Genetic Improvement (Ministry of Agriculture), Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China. 115425193@163.com. Key Laboratory of Horticultural Crops Genetic Improvement (Ministry of Agriculture), Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China. yuhongjun@caas.cn. Key Laboratory of Horticultural Crops Genetic Improvement (Ministry of Agriculture), Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China. yijinlidy@163.com. Key Laboratory of Horticultural Crops Genetic Improvement (Ministry of Agriculture), Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China. 13716247546@163.com. Key Laboratory of Horticultural Crops Genetic Improvement (Ministry of Agriculture), Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China. pengliucaas@foxmail.com. Key Laboratory of Horticultural Crops Genetic Improvement (Ministry of Agriculture), Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China. liqiang05@caas.cn. Key Laboratory of Horticultural Crops Genetic Improvement (Ministry of Agriculture), Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China. jiangweijie@caas.cn. College of Forestry and Horticulture; Xinjiang Agricultural University, Urumqi 830052, China. jiangweijie@caas.cn"
Journal Title:		Int J Mol Sci
Year:		2016
Volume:		20161102
Issue:		11
Page Number:		-
DOI:		10.3390/ijms17111713
ISSN/ISBN:		1422-0067 (Electronic) 1422-0067 (Linking)
Abstract:		"Nitrogen (N) is an important macronutrient for plant growth and development, but the regulatory mechanism of volatile compounds in response to N deficiency is not well understood, especially in cucumber, which consumes excessive N during growth. In this study, the major volatile compounds from cucumber leaves subjected to N deficiency were analyzed by GC-MS. A total of 24 volatile components were identified including 15 aldehydes, two ketones, two alkenes, and five other volatile compounds in 9930 leaves. Principal component analysis using volatile compounds from cucumber leaves provided good separation between N-sufficient and N-deficient treatments. The main volatiles in cucumber leaves were found to be C6 and C9 aldehydes, especially (E)-2-hexanal and (E,Z)-2,6-nonadienal. (E)-2-hexanal belonged to the C6 aldehyde and was the most abundant compound, whereas (E,Z)-2,6-nonadienal was the chief component of C9 aldehydes. During N-deficient treatment, short-chain volatile content was significantly improved at 5 day, other volatiles displayed significant reduction or no significantly changes in all sampling points. Improvement of short-chain volatiles was confirmed in the six other inbred lines at 5 day after N-deficient treatments. The expression analysis of 12 cucumber LOX genes and two HPL genes revealed that CsLOX19, CsLOX20, and CsLOX22 had common up-regulated expression patterns in response to N-deficient stress in most inbred lines; meanwhile, most sample points of CsHPL1 also had significant up-regulated expression patterns. This research focused on the relationship between volatiles in cucumber and different nitrogen environments to provide valuable insight into the effect of cultivation and management of the quality of cucumber and contributes to further research on volatile metabolism in cucumber"
Keywords:		"Aldehydes/isolation & purification/metabolism Alkenes/isolation & purification/metabolism Cucumis sativus/*drug effects/genetics/metabolism Gas Chromatography-Mass Spectrometry *Gene Expression Regulation, Plant Hydro-Lyases/genetics/metabolism Ketones/is;"
Notes:		"MedlineDeng, Jie Yu, Hong-Jun Li, Yun-Yun Zhang, Xiao-Meng Liu, Peng Li, Qiang Jiang, Wei-Jie eng Switzerland 2016/11/10 Int J Mol Sci. 2016 Nov 2; 17(11):1713. doi: 10.3390/ijms17111713"