【摘 要】
：
Exogenous salicylic acid (SA) can significantly improve abiotic tolerance in higher plants.In this study,the effects ofpretreatment with 0.5 mM salicylic acid (SA)on protecting the growth from subsequ
论文部分内容阅读
Exogenous salicylic acid (SA) can significantly improve abiotic tolerance in higher plants.In this study,the effects ofpretreatment with 0.5 mM salicylic acid (SA)on protecting the growth from subsequent drought stress (PEG-6000,20％) in maize seedlings were investigated.The results showed that under drought stress,(1) SA pretreatment increased the activities of antioxidative enzymes,including superoxide dismutase and peroxidase,by 45.9％,16.9％％,respectively.And then,the accumulation of O2-and hydrogen peroxide (H2O2) were reduced significantly,then lipid peroxidation was relatively relieved;(2) SA significantly increased the content of proline by 16.7％,decreased the accumulation of malondialdehyde (MDA) by 26.2％,and improve the seedling drought resistance;(3) Interestingly,SA protected the photosystem Ⅱ (PSⅡ) photochemistry reaction,performing as increased the potential photochemical efficiency (Fv/Fm) of PSⅡ and electron transport rate;(4)Meanwhile,SA inhibited the decrease of D1 protein in PSⅡ reactive center that is caused by stress,and the change of the psbA gene transcription was in the same way.
其他文献
The major storage proteins in maize seed are nearly lysine-free prolamins called zeins,which contribute little to nutritional quality in terms of the protein assimilation.The opaque2 (o2) mutant synth
Modern maize breeding process have generated enormous amount of genetic variants which may contribute to the phenotype diversity.On top of re-sequencing data of 278 maize inbred lines,we expanded the
Phosphate (Pi) deficiency has become a significant challenge to worldwide agriculture due to the depletion of accessible rock phosphate that is the major source of cheap Pi fertilizers.Previous resear
Phosphate (Pi) deficiency has become a significant challenge to worldwide agriculture due to the depletion of accessible rock phosphate that is the major source of cheap Pi fertilizers.Previous resear
The length of internodes under the ear in many crop plants is related to logging resistant in the field.To understand how internode morphological distinctions are related to the proteins in maize (Zea
The length of internodes under the ear in many crop plants is related to logging resistant in the field.To understand how internode morphological distinctions are related to the proteins in maize (Zea
Improving grain yield is an essential long-term goal of maize breeding to meet continual and increasing food demands worldwide.We dissected the genetic architecture of maize ear traits using a set of
Reduction-oxidation-sensitive green fluorescent proteins (roGFPs) have been demonstrated to be valuable tools in sensing cellular redox changes in mammalian cells and model plants,yet have not been ap
Maize is one of the major food crops in the world,many researchers have focused on studying its agronomic traits related to the yield,especially the traits of the seeds.Here,we reported the molecular
Whole genome duplications (WGDs) are a widespread feature during plant genome evolution,creating the types of single gene and duplicate genes by biased fractionation and genome dominance.Despite the p