Differential inductions of phenylalanine ammonia-lyase and chalcone synthase during wounding, salicylic acid treatment, and salinity stress in safflower, Carthamus tinctorius

被引:86
作者
Dehghan, Sara [1 ]
Sadeghi, Mahnaz [1 ]
Poeppel, Anne [3 ]
Fischer, Rainer [2 ]
Lakes-Harlan, Reinhard [4 ]
Kavousi, Hamid Reza [1 ]
Vilcinskas, Andreas [2 ,3 ]
Rahnamaeian, Mohammad [2 ,3 ]
机构
[1] Shahid Bahonar Univ Kerman, Dept Plant Biotechnol, Coll Agr, Kerman, Iran
[2] Fraunhofer Inst Mol Biol & Appl Ecol IME, LOEWE Ctr Insect Biotechnol & Bioresources, D-35394 Giessen, Germany
[3] Univ Giessen, Interdisciplinary Res Ctr, Inst Phytopathol & Appl Zool, D-35392 Giessen, Germany
[4] Univ Giessen, AG Integrat Sensory Physiol, Inst Anim Physiol, D-35392 Giessen, Germany
关键词
defence response; safflower; salicylic acid (SA); salinity; semi-quantitative RT-PCR; wounding; CINNAMATE; 4-HYDROXYLASE; MOLECULAR-CLONING; PHENYLPROPANOID BIOSYNTHESIS; GENE-EXPRESSION; RESISTANCE; ARABIDOPSIS; METABOLISM; ACTIVATION; BRANCHES; PATHWAY;
D O I
10.1042/BSR20140026
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Safflower (Carthamus tinctorius L.) serves as a reference dicot for investigation of defence mechanisms in Asteraceae due to abundant secondary metabolites and high resistance/tolerance to environmental stresses. In plants, phenyl-propanoid and flavonoid pathways are considered as two central defence signalling cascades in stress conditions. Here, we describe the isolation of two major genes in these pathways, CtPAL (phenylalanine ammonia-lyase) and CtCHS (chalcone synthase) in safflower along with monitoring their expression profiles in different stress circumstances. The aa (amino acid) sequence of isolated region of CtPAL possesses the maximum identity up to 96% to its orthologue in Cynara scolymus, while that of CtCHS retains the highest identity to its orthologue in Callistephus chinensis up to 96%. Experiments for gene expression profiling of CtPAL and CtCHS were performed after the treatment of seedlings with 0.1 and 1 mM SA (salicylic acid), wounding and salinity stress. The results of semi-quantitative RT-PCR revealed that both CtPAL and CtCHS genes are further responsive to higher concentration of SA with dissimilar patterns. Regarding wounding stress, CtPAL gets slightly induced upon injury at 3 hat (hours after treatment) (hat), whereas CtCHS gets greatly induced at 3 hat and levels off gradually afterward. Upon salinity stress, CtPAL displays a similar expression pattern by getting slightly induced at 3 hat, but CtCHS exhibits a biphasic expression profile with two prominent peaks at 3 and 24 hat. These results substantiate the involvement of phenylpropanoid and particularly flavonoid pathways in safflower during wounding and especially salinity stress.
引用
收藏
页码:273 / 282
页数:10
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