Abstract
Alternative splicing (AS) in eukaryotic organisms is closely related to the gene regulation in plant abiotic stress responses, in which serine/arginine-rich proteins (SR proteins) act as key regulators. The genome sequence of maize inbred line B73 was analyzed, showing that the promoter regions of SR genes possess about three to eight kinds of cis-acting regulatory elements. Twenty-seven SR genes encode alkaline proteins, and 23 of which are divided into five subgroups in terms of the first RNA recognition motif (RRM) at the amino terminal. The expression of SR genes showed tissue-specific and genotype-dependent features under drought stress in the hybrid Zhengdan-958 and its parents, Zheng-58 and Chang-7-2 via bidirectional hierarchical clustering. SR genes were down-regulated in roots while they were up-regulated in shoots under drought stress. However, SR genes were down-regulated in both roots and shoots in three different rehydration stages after severe drought stress. Additionally, a widespread alternative splicing exists in all SR genes although SR genes showed differential expression tendency under drought stress and/or during rehydration stages. Results above will deepen our understanding of the molecular mechanisms of plant response to abiotic stress from the perspective of AS-network.
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Claims 9
Claim · model-written summary
Maize SR gene promoters had about three to eight types of cis-acting regulatory elements.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the promoter regions of SR genes possess about three to eight kinds of cis-acting regulatory elements”
t0“maize”
Claim · model-written summary
Twenty-seven SR genes encode alkaline proteins.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Twenty-seven SR genes encode alkaline proteins”
t0“maize”
Claim · model-written summary
Twenty-three SR genes were divided into five subgroups using the first RRM.
- Gene
- RNA recognition motif (RRM)e0
- Outcome
- divided into five subgroupse0
- Value
- five subgroupse0
- Qualifier
- 23 of whiche0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“23 of which are divided into five subgroups in terms of the first RNA recognition motif (RRM) at the amino terminal”
t0“maize”
Claim · model-written summary
SR gene expression varied by tissue and genotype under drought.
- Material
- Zhengdan-958 and its parents, Zheng-58 and Chang-7-2e0
- Gene
- SR genese0
- Outcome
- tissue-specific and genotype-dependent featurese0
- Qualifier
- under drought stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The expression of SR genes showed tissue-specific and genotype-dependent features under drought stress in the hybrid Zhengdan-958 and its parents, Zheng-58 and Chang-7-2”
t0“maize”
Claim · model-written summary
Drought downregulated SR genes in roots.
- Organ / stage
- rootse0
- Treatment
- drought stresse0
- Gene
- SR genese0
- Outcome
- SR genese0
- Direction
- down-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SR genes were down-regulated in roots while they were up-regulated in shoots under drought stress”
t0“maize”
Claim · model-written summary
Drought upregulated SR genes in shoots.
- Organ / stage
- shootse0
- Treatment
- drought stresse0
- Gene
- SR genese0
- Outcome
- SR genese0
- Direction
- up-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SR genes were down-regulated in roots while they were up-regulated in shoots under drought stress”
t0“maize”
Claim · model-written summary
SR genes were downregulated in roots during all three rehydration stages.
- Organ / stage
- rootse0
- Treatment
- rehydration stages after severe drought stresse0
- Gene
- SR genese0
- Outcome
- SR genese0
- Direction
- down-regulatede0
- Value
- three different rehydration stagese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SR genes were down-regulated in both roots and shoots in three different rehydration stages after severe drought stress”
t0“maize”
Claim · model-written summary
SR genes were downregulated in shoots during all three rehydration stages.
- Organ / stage
- shootse0
- Treatment
- rehydration stages after severe drought stresse0
- Gene
- SR genese0
- Outcome
- SR genese0
- Direction
- down-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SR genes were down-regulated in both roots and shoots in three different rehydration stages after severe drought stress”
t0“maize”
Claim · model-written summary
All SR genes showed alternative splicing despite differing expression under drought or rehydration.
- Gene
- SR genese0
- Outcome
- alternative splicinge0
- Qualifier
- under drought stress and/or during rehydration stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a widespread alternative splicing exists in all SR genes although SR genes showed differential expression tendency under drought stress and/or during rehydration stages”
t0“maize”
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