期刊
PLANTS-BASEL
卷 10, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/plants10050826
关键词
nitrogen starvation; water-deficit and heat stress; transgenerational effects; cross stress tolerance; microRNAs; crop improvement
资金
- Australian Research Council [DE180100784]
- Australian Research Council [DE180100784] Funding Source: Australian Research Council
Transgenerational effects of water-deficit and heat stress were investigated on the response of durum wheat seedlings to nitrogen starvation. Two genotypes showed significant reductions in growth under nitrogen starvation stress, with the stress-tolerant genotype exhibiting lower reductions in most traits in progeny from stressed parents. Small RNA sequencing identified 1534 microRNAs in different treatment groups, providing insights into the molecular mechanisms underlying stress adaptation processes.
Stress events have transgenerational effects on plant growth and development. In Mediterranean regions, water-deficit and heat (WH) stress is a frequent issue that negatively affects crop yield and quality. Nitrogen (N) is an essential plant macronutrient and often a yield-limiting factor for crops. Here, the response of durum wheat seedlings to N starvation under the transgenerational effects of WH stress was investigated in two genotypes. Both genotypes showed a significant reduction in seedling height, leaf number, shoot and root weight (fresh and dry), primary root length, and chlorophyll content under N starvation stress. However, in the WH stress-tolerant genotype, the percentage reduction of most traits was lower in progeny from the stressed parents than progeny from the control parents. Small RNA sequencing identified 1534 microRNAs in different treatment groups. Differentially expressed microRNAs (DEMs) were characterized subject to N starvation, parental stress and genotype factors, with their target genes identified in silico. GO and KEGG enrichment analyses revealed the biological functions, associated with DEM-target modules in stress adaptation processes, that could contribute to the phenotypic differences observed between the two genotypes. The study provides the first evidence of the transgenerational effects of WH stress on the N starvation response in durum wheat.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据