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• W2359517254 abstract "At present,more and more serious soil salinization is one of the main environmental factors that limit plant growth and crop yield. Many halophilous plants often grow in the saline-alkaline land. In order to better understand the salt tolerant mechanism of halophytic plants,this paper mainly explored some physiological characteristics of the halophytic plant Kalidium foliatum to salt stress according to some physiological indexes. The halophyte K. foliatum is a kind of very salt-tolerant shrub belonging to Chenopodiaceae with high succulence and grows commonly in saline and alkaline arid-desert regions in Xinjiang. Some physiological parameters were detected including the contents of Na+,K+,Ca2 +and proline,the water potential of plant leaf tissue,the content of membrane lipid peroxidation( MDA) and phenotype observation; gene expression of Kf P5 CS,encoding protein( pyrroline-5-carboxylate synthetase) as a key enzyme catalyzing to synthesize proline by semi-quantitative RT-PCR were assayed to salt stress. The results were as follows:( 1) Na+could accumulate significantly in succulent leaves and roots of K. foliatum,and even the content of Na+in leaves was more than roots;( 2) With increasing salt concentration,the content of proline and the gene expression of Kf P5 CS were enhanced significantly under salt stress conditions;( 3) Na+and proline as plant effective osmotic regulators,could make the plant cells be still able to absorb water at low water potential from the highly concentrated salt solution,extracellularly;( 4) Under 0 and 700 mmol·L- 1Na Cl treatments,the contents of MDA in the leaves of K. foliatum were higher than other salt treatments,suggesting that the plants might be subjected to oxidative stress under the both treatments. This phenomenon indicated that the growth environments with the both treatments might be adverse for the plants;( 5) From the growth phenotype to salt stress,the biomass of K. foliatum was more under low salt treatments,and the plant growth was better and stronger,indicating the low salt environment seemed to be beneficial to the K. foliatum growth. In summary,the results of the investigation of the K. foliatum plant growth in wild grown environment and under long-term salt stress in our lab showed that it was necessary for the good growth of K. foliatum in a certain salt concentration condition. A relative low salt concentration environment is very optimal for the growth of some very salt-tolerant halophytes like K. foliatum. However,we can also speculate neither salt nor high concentration salt conditions is the stressed environment for the K. foliatum plant growth. The study could provide primary reference for understanding the salt tolerance of K. foliatum and it is also very promising to improve salt tolerance in crops and woods by making use of gene resources of this species and the halophyte K. foliatum could be also used to ameliorate saline-alkaline land by reducing the salt content of soil." @default.
• W2359517254 created "2016-06-24" @default.
• W2359517254 creator A5003965960 @default.
• W2359517254 date "2015-01-01" @default.
• W2359517254 modified "2023-09-28" @default.
• W2359517254 title "Physiological characteristics of the halophytic plant Kalidium foliatum to salt stress" @default.
• W2359517254 hasPublicationYear "2015" @default.
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