Abstract
Drought is a significant environmental stress factor that adversely affects maize productivity. However, many details regarding the molecular mechanisms of maize against drought are still unclear. In this study, leaf transcriptomics and physiological traits of two maize genotypes with differing drought resistance were analyzed. Transcriptome sequencing identified 8985 and 7305 differentially expressed genes (DEGs) in SD902 and SD609, respectively. Functional analysis suggested that numerous genes are highly involved in oxidative defense, protein modification, photosynthesis, phytohormone response, MAPK signaling, and transcription factors (TFs). Compared to SD902, SD609 had a higher expression of DEGs related to antioxidant enzymes, photosynthetic electron transport, heat shock proteins, and indole-3-acetic acid (IAA) signaling under drought conditions, which might contribute to its tolerance mechanisms to drought. Stress-induced TFs may play a crucial regulatory role in genotypic differences. Moreover, the physiological changes and gene expression abundance determined using quantitative reverse transcription polymerase chain reaction were consistent with the RNA sequencing data. The study results suggest that the higher drought tolerance of SD609 than SD902 can be attributed to stronger stress defense capabilities, IAA signal transduction, and more stable photosynthesis. Our findings provide new insights into the molecular mechanisms of maize against drought stress, and the candidate genes identified may be used in breeding drought-tolerant maize cultivars.
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Claims 7
Claim · model-written summary
SD902 had 8985 differentially expressed genes under drought.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Transcriptomic and physiological responses of contrasting maize genotypes to drought stress”
e1“Transcriptome sequencing identified 8985 and 7305 differentially expressed genes (DEGs) in SD902 and SD609, respectively”
Claim · model-written summary
SD609 had 7305 differentially expressed genes under drought.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Transcriptomic and physiological responses of contrasting maize genotypes to drought stress”
e1“Transcriptome sequencing identified 8985 and 7305 differentially expressed genes (DEGs) in SD902 and SD609, respectively”
Claim · model-written summary
SD609 showed higher expression of DEGs related to antioxidant enzymes, photosynthetic electron transport and heat shock proteins than SD902 under drought.
- Material
- SD609e2
- Treatment
- drought conditionse2
- Outcome
- expression of DEGs related to antioxidant enzymes, photosynthetic electron transport, heat shock proteinse2
- Direction
- highere2
- Comparator
- SD902e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Transcriptomic and physiological responses of contrasting maize genotypes to drought stress”
e2“Compared to SD902, SD609 had a higher expression of DEGs related to antioxidant enzymes, photosynthetic electron transport, heat shock proteins, and indole-3-acetic acid (IAA) signaling under drought conditions”
Claim · model-written summary
SD609 showed higher IAA signalling DEG expression than SD902 under drought.
- Material
- SD609e2
- Treatment
- drought conditionse2
- Outcome
- indole-3-acetic acid (IAA) signalinge2
- Direction
- highere2
- Comparator
- SD902e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Transcriptomic and physiological responses of contrasting maize genotypes to drought stress”
e2“Compared to SD902, SD609 had a higher expression of DEGs related to antioxidant enzymes, photosynthetic electron transport, heat shock proteins, and indole-3-acetic acid (IAA) signaling under drought conditions”
Claim · model-written summary
The higher drought tolerance of SD609 than SD902 is attributed to stronger stress defense, IAA signal transduction and more stable photosynthesis.
- Material
- SD609e3
- Outcome
- drought tolerancee3
- Qualifier
- stronger stress defense capabilities, IAA signal transduction, and more stable photosynthesise3
- Comparator
- SD902e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Transcriptomic and physiological responses of contrasting maize genotypes to drought stress”
e3“The study results suggest that the higher drought tolerance of SD609 than SD902 can be attributed to stronger stress defense capabilities, IAA signal transduction, and more stable photosynthesis”
Claim · model-written summary
qRT-PCR physiological changes and gene expression were consistent with the RNA sequencing data.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Transcriptomic and physiological responses of contrasting maize genotypes to drought stress”
e4“Moreover, the physiological changes and gene expression abundance determined using quantitative reverse transcription polymerase chain reaction were consistent with the RNA sequencing data”
Claim · model-written summary
Functional analysis suggested that numerous DEGs are involved in oxidative defense, protein modification, photosynthesis, phytohormone response, MAPK signalling and transcription factors.
- Outcome
- oxidative defense, protein modification, photosynthesis, phytohormone response, MAPK signaling, and transcription factors (TFs)e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Transcriptomic and physiological responses of contrasting maize genotypes to drought stress”
e5“Functional analysis suggested that numerous genes are highly involved in oxidative defense, protein modification, photosynthesis, phytohormone response, MAPK signaling, and transcription factors (TFs)”
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