为探究盐胁迫对番茄幼苗生长及生理的影响,以黄贵妃樱桃番茄为实验材料,在温室内利用1/2 Hoagland营养液进行培养,用100 mM NaCl进行胁迫处理,并对根长、地上部高度、叶绿素、MDA、POD、可溶性糖、脯氨酸等生长指标和生理指标进行测定...为探究盐胁迫对番茄幼苗生长及生理的影响,以黄贵妃樱桃番茄为实验材料,在温室内利用1/2 Hoagland营养液进行培养,用100 mM NaCl进行胁迫处理,并对根长、地上部高度、叶绿素、MDA、POD、可溶性糖、脯氨酸等生长指标和生理指标进行测定。结果显示,在盐胁迫下,番茄幼苗中的叶绿素遭到破坏,含量显著降低,而可溶性糖、MDA、脯氨酸含量以及POD活性都呈显著上升趋势。这些都表明黄贵妃樱桃番茄可以通过调节自身的生理功能来抵御盐胁迫带来的损害。展开更多
Salt stress and flowering time are major factors limiting geographic adaptation and yield productivity in soybean(Glycine max).Although improving crop salt tolerance and latitude adaptation are essential for efficient...Salt stress and flowering time are major factors limiting geographic adaptation and yield productivity in soybean(Glycine max).Although improving crop salt tolerance and latitude adaptation are essential for efficient agricultural production,whether and how these two traits are integrated remains largely unknown.Here,we used a genome-wide association study to identify a major salt-tolerance locus controlled by E2,an ortholog of Arabidopsis thaliana GIGANTEA(GI).Loss of E2 function not only shortened flowering time and maturity,but also enhanced salt-tolerance in soybean.E2 delayed soybean flowering by enhancing the transcription of the core flowering suppressor gene E1,thereby repressing Flowering Locus T(FT)expression.An E2 knockout mutant e2^(CR) displayed reduced accumulation of reactive oxygen species(ROS)during the response to salt stress by releasing peroxidase,which functions in ROS scavenging to avoid cytotoxicity.Evolutionary and population genetic analyses also suggested that loss-of-function e2 alleles have been artificially selected during breeding for soybean adaptation to high-latitude regions with greater salt stress.Our findings provide insights into the coupled selection for adaptation to both latitude and salt stress in soybean;and offer an ideal target for molecular breeding of early-maturing and salt-tolerant cultivars.展开更多
文摘为探究盐胁迫对番茄幼苗生长及生理的影响,以黄贵妃樱桃番茄为实验材料,在温室内利用1/2 Hoagland营养液进行培养,用100 mM NaCl进行胁迫处理,并对根长、地上部高度、叶绿素、MDA、POD、可溶性糖、脯氨酸等生长指标和生理指标进行测定。结果显示,在盐胁迫下,番茄幼苗中的叶绿素遭到破坏,含量显著降低,而可溶性糖、MDA、脯氨酸含量以及POD活性都呈显著上升趋势。这些都表明黄贵妃樱桃番茄可以通过调节自身的生理功能来抵御盐胁迫带来的损害。
基金supported by the Major Program of Guangdong Basic and Applied Research (Grant no. 2019B030302006 to F.K. and B.L.)supported by the National Natural Science Foundation of China (Grant no. 32090064 to F.K., 31930083 to B.L.)supported by Science and Technology Planning Project of Guangzhou (Grant no. 202102010388 to L.D., 202102010389 to Q.C.)
文摘Salt stress and flowering time are major factors limiting geographic adaptation and yield productivity in soybean(Glycine max).Although improving crop salt tolerance and latitude adaptation are essential for efficient agricultural production,whether and how these two traits are integrated remains largely unknown.Here,we used a genome-wide association study to identify a major salt-tolerance locus controlled by E2,an ortholog of Arabidopsis thaliana GIGANTEA(GI).Loss of E2 function not only shortened flowering time and maturity,but also enhanced salt-tolerance in soybean.E2 delayed soybean flowering by enhancing the transcription of the core flowering suppressor gene E1,thereby repressing Flowering Locus T(FT)expression.An E2 knockout mutant e2^(CR) displayed reduced accumulation of reactive oxygen species(ROS)during the response to salt stress by releasing peroxidase,which functions in ROS scavenging to avoid cytotoxicity.Evolutionary and population genetic analyses also suggested that loss-of-function e2 alleles have been artificially selected during breeding for soybean adaptation to high-latitude regions with greater salt stress.Our findings provide insights into the coupled selection for adaptation to both latitude and salt stress in soybean;and offer an ideal target for molecular breeding of early-maturing and salt-tolerant cultivars.
