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Drought is a major threat
to global food production.
Roots and stomata are the two organs that most directly affect the drought coping ability of plants
.
Recently, Professor Lu Yanli's team (State Key Laboratory of Crop Gene Discovery and Utilization in Southwest China; Maize Research Institute) found that ZmLBD5 gene can negatively regulate the production of corn abscisic acid (ABA) and gibberellin (GA) and thus affect its drought resistance, and the ZmLBD5 gene knockout material shows better drought
resistance.
to global food production.
Roots and stomata are the two organs that most directly affect the drought coping ability of plants
.
Recently, Professor Lu Yanli's team (State Key Laboratory of Crop Gene Discovery and Utilization in Southwest China; Maize Research Institute) found that ZmLBD5 gene can negatively regulate the production of corn abscisic acid (ABA) and gibberellin (GA) and thus affect its drought resistance, and the ZmLBD5 gene knockout material shows better drought
resistance.
LBD family genes are a class of transcription factors
unique to plants.
Family members of the first and second families are generally considered to have possible functional differentiation, and the sequence differences between the two types of members are mainly reflected in the integrity of a domain involved in protein dimerization
.
LBD I members have been widely studied and reported to be involved in a variety of biological processes, but very little
has been reported about members of the second category.
We found that LBD5, a member of the second category, may be involved in the drought response, so further research
was conducted.
Although LBD5 does not have a complete protein dimeration domain, its own interactions or interactions with other family members are not affected
.
Therefore, we speculate that there may not be a clear differentiation in the functions of family members of the first and second families
.
unique to plants.
Family members of the first and second families are generally considered to have possible functional differentiation, and the sequence differences between the two types of members are mainly reflected in the integrity of a domain involved in protein dimerization
.
LBD I members have been widely studied and reported to be involved in a variety of biological processes, but very little
has been reported about members of the second category.
We found that LBD5, a member of the second category, may be involved in the drought response, so further research
was conducted.
Although LBD5 does not have a complete protein dimeration domain, its own interactions or interactions with other family members are not affected
.
Therefore, we speculate that there may not be a clear differentiation in the functions of family members of the first and second families
.
Using transgenic overexpression and knockout materials, we found that the downstream genes regulated by LBD5 were mainly concentrated in the ABA and GA synthesis pathways
.
The overexpression of LBD5 can inhibit ABA synthesis, promote the occurrence of stomata, and reduce the sensitivity of stomata to drought stress, so LBD5 overexpression plants are drought-sensitive
.
However, LBD5 gene-deficient plants had better drought resistance and higher yields under drought in the field, while growing under normal water conditions in the field had no significant effect
.
Therefore, this gene can be used as a gene target for drought-resistant breeding of maize
.
.
The overexpression of LBD5 can inhibit ABA synthesis, promote the occurrence of stomata, and reduce the sensitivity of stomata to drought stress, so LBD5 overexpression plants are drought-sensitive
.
However, LBD5 gene-deficient plants had better drought resistance and higher yields under drought in the field, while growing under normal water conditions in the field had no significant effect
.
Therefore, this gene can be used as a gene target for drought-resistant breeding of maize
.
The research paper entitled "ZmLBD5, a class-II LBD gene, negatively regulates drought tolerance by impairing abscisic acid synthesis" was published in Plant Journal (Top 1 region, SCI impact factor 7.
091).
。 Dr.
Feng Xuanjun, a young teacher of Guowei, Xiong Jing, a graduated doctoral student, Zhang Weixiao, a doctoral student, are the co-first authors of the paper, and Professor Lu Yanli is the corresponding author
.
The research was supported
by the National Key Research and Development Program of China, the National Natural Science Foundation of China, and the Double Support Program of Sichuan Agricultural University.
091).
。 Dr.
Feng Xuanjun, a young teacher of Guowei, Xiong Jing, a graduated doctoral student, Zhang Weixiao, a doctoral student, are the co-first authors of the paper, and Professor Lu Yanli is the corresponding author
.
The research was supported
by the National Key Research and Development Program of China, the National Natural Science Foundation of China, and the Double Support Program of Sichuan Agricultural University.
