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The Screening of Melon（Cucumis melo L.）Seedling Cultivars for Salt-alkaline Tolerance and the Concentration of γ-aminobutyric Acid Alleviating Salt-alkaline Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2014年09期
Page:
1-7
Research Field:
Publishing date:

Info

Title:
The Screening of Melon（Cucumis melo L.）Seedling Cultivars for Salt-alkaline Tolerance and the Concentration of γ-aminobutyric Acid Alleviating Salt-alkaline Stress
Author(s):
ZHAO Jiu-zhou; HU Li-pan; XU Zhi-ran; SHEN Lu; HU Xiao-hui
College of Horticulture,Northwest Agricultural and Forestry University,Key Laboratory of Protected Horticultural Engineering in Northwest,Ministry of Agriculture, Yangling, Shaanxi 712100
Keywords:
salt-alkaline stress; melon; seedlings; tolerance evaluation; γ-aminobutyric（GABA）; growth
PACS:
S 652
DOI:
-
Abstract:
Taking 20 melon cultivars with different characters as materials,using the 50 mmol/L mixed salt-alkaline solution （NaCl∶ Na2SO4∶ NaHCO3∶ Na2CO3=9∶1∶1∶9,pH 10.80 to simulate the typical salt-alkaline stress environment.The melon seedlings with four leaf were ?treated with salt-alkaline solution for 7 days,the changes of 20 melon cultivars seedling shoot fresh weight（SFW）,root fresh weight（RFW）,taproot length（TL）,leaf area（LA）and total chlorophyll content（Chl） were studied,and the salt-alkaline tolerance of melon cultivars were evaluated by the cluster analysis.Chosen two melon cultivars which had significantly different tolerance as test materials, foliar application of different concentrations of γ-aminobutyric acid（GABA）(0,25,50,75 mmol/L),changes of melon seedling growth were measured,in order to find the appropriate concentration of salt-alkaline stress relief,thus providing basis of regulation to reduce salinity stress.The results showed that,the 20 kinds of melon could be divided into three categories using cluster analysis.‘Lingtian No.1’,‘Haimi No.4’,‘Baixiangmi’,‘Shantian No.1’ and ‘Jinhui No.1’ were salt-alkaline tolerance cultivars,‘Yipin Tianxia No.108’,‘Lingtian No.4’ and ‘Yipin Tianxia No.208’ were salt-alkaline sensitive cultivars,‘Qianyu No.1’,‘Shantian No.3’,‘Xuelian’,‘Wutaishan No.3’, ‘Yulu’, ‘Baiyuxiang’ ,‘Tianjiao’,‘Guifeixuemi’,‘Ruixuexinzaomi’,‘Zhimami’,‘Jingtian No.208’,‘Lingtian No.3’ were moderate salt-alkaline tolerance cultivars.When the GABA spraying concentration was 25~50 mmol/L,there was a certain role relief of the melon seedlings growth under salt-alkaline stress,and the 50 mmol/L GABA was the best effect,while the 75 mmol/L GABA did not play an effective alleviating effects.

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Last Update: 2014-08-13