近年来,全球低温极端气候频发,对水稻生产带来严重的影响。低温严重限制了水稻种植区域的扩大。因此,鉴定克隆水稻低温发育相关基因,阐明其分子机理,可为水稻低温分子育种奠定理论基础。本研究从水稻日本晴化学诱变突变体库筛选鉴定到1...近年来,全球低温极端气候频发,对水稻生产带来严重的影响。低温严重限制了水稻种植区域的扩大。因此,鉴定克隆水稻低温发育相关基因,阐明其分子机理,可为水稻低温分子育种奠定理论基础。本研究从水稻日本晴化学诱变突变体库筛选鉴定到1个低温叶片白化的突变体lta1(Low temperature albinism1)。相比野生型,在20℃生长条件下,突变体lta1叶片白化,叶绿素含量显著降低,叶绿体结构发育异常;在30℃生长条件下,突变体lta1与野生型生长无显著差异。通过图位克隆将突变基因lta1定位在第3号染色体短臂InDel标记LTA1-3与LTA1-7之间,物理距离为132 kb。基于水稻基因表达数据库,在132 kb区间内有17个候选基因,其中有6个候选基因翻译的蛋白可能定位于叶绿体。实时荧光定量PCR结果表明多数叶绿体编码基因的表达在突变体中受到显著抑制,而多数叶绿素合成相关基因的表达未发生显著变化。本研究结果为进一步克隆LTA1基因与揭示水稻低温下叶绿体发育的机理提供可能。展开更多
The soybean rhizosphere has a specific microbial community,but the differences in microbial community structure between different soybean genotypes have not been explained.The present study analyzed the structure of t...The soybean rhizosphere has a specific microbial community,but the differences in microbial community structure between different soybean genotypes have not been explained.The present study analyzed the structure of the rhizosphere microbial community in three soybean genotypes.Differences in rhizosphere microbial communities between different soybean genotypes were verified using diversity testing and community composition,and each genotype had a specific rhizosphere microbial community composition.Co-occurrence network analysis found that different genotype plant hosts had different rhizosphere microbial networks.The relationship between rhizobia and rhizosphere microorganisms in the network also exhibited significant differences between different genotype plant hosts.The ecological function prediction found that different genotypes of soybean recruited the specific rhizosphere microbial community.These results demonstrated that soybean genotype regulated rhizosphere microbial community structure differences.The study provides a reference and theoretical support for developing soybean microbial inoculum in the future.展开更多
文摘近年来,全球低温极端气候频发,对水稻生产带来严重的影响。低温严重限制了水稻种植区域的扩大。因此,鉴定克隆水稻低温发育相关基因,阐明其分子机理,可为水稻低温分子育种奠定理论基础。本研究从水稻日本晴化学诱变突变体库筛选鉴定到1个低温叶片白化的突变体lta1(Low temperature albinism1)。相比野生型,在20℃生长条件下,突变体lta1叶片白化,叶绿素含量显著降低,叶绿体结构发育异常;在30℃生长条件下,突变体lta1与野生型生长无显著差异。通过图位克隆将突变基因lta1定位在第3号染色体短臂InDel标记LTA1-3与LTA1-7之间,物理距离为132 kb。基于水稻基因表达数据库,在132 kb区间内有17个候选基因,其中有6个候选基因翻译的蛋白可能定位于叶绿体。实时荧光定量PCR结果表明多数叶绿体编码基因的表达在突变体中受到显著抑制,而多数叶绿素合成相关基因的表达未发生显著变化。本研究结果为进一步克隆LTA1基因与揭示水稻低温下叶绿体发育的机理提供可能。
基金funded by the Key Research and Development Projects of Heilongjiang Province, China (GA21B007 and GZ20210014)the Basic Research Fees of Universities in Heilongjiang Province, China (135409103)。
文摘The soybean rhizosphere has a specific microbial community,but the differences in microbial community structure between different soybean genotypes have not been explained.The present study analyzed the structure of the rhizosphere microbial community in three soybean genotypes.Differences in rhizosphere microbial communities between different soybean genotypes were verified using diversity testing and community composition,and each genotype had a specific rhizosphere microbial community composition.Co-occurrence network analysis found that different genotype plant hosts had different rhizosphere microbial networks.The relationship between rhizobia and rhizosphere microorganisms in the network also exhibited significant differences between different genotype plant hosts.The ecological function prediction found that different genotypes of soybean recruited the specific rhizosphere microbial community.These results demonstrated that soybean genotype regulated rhizosphere microbial community structure differences.The study provides a reference and theoretical support for developing soybean microbial inoculum in the future.