Abstract
Alternate wetting and drying (AWD) irrigation has been widely used as an efficient rice production method to obtain better yield without continuous flooding (CF) of the paddy field. However, how this practice affects gene expression to regulate rice physiology and morphology is largely unknown. In this study, we used two rice varieties, Nipponbare, a lowland rice cultivar, and Gaoshan 1, an upland cultivar, and found that root dry weight (RDW) and root oxidation activity (ROA) in both cultivars substantially increased in response to AWD. We then analyzed the differences in transcriptome profiles of their roots irrigated in AWD vs. CF conditions. AWD responsive genes are mainly involved in lignin biosynthetic pathway and phytohormone signal transduction pathway and belong mainly to bHLH, bZIP, NAC, WRKY, and HSF transcription factor families. We discussed how these differentially expressed genes may contribute to the morphological adaptations observed in roots exposed to AWD. This analysis also provides useful information to explain the similarities and differences in adaptation to AWD irrigation between the two rice ecotypes.
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Claims 3
Claim · model-written summary
Alternate wetting and drying increased root dry weight in both rice cultivars.
- Taxon
- rice
Oryza sativae0 - Material
- Nipponbare, a lowland rice cultivar, and Gaoshan 1, an upland cultivare0
- Treatment
- AWDe0
- Outcome
- root dry weighte0
- Direction
- substantially increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two rice varieties, Nipponbare, a lowland rice cultivar, and Gaoshan 1, an upland cultivar, and found that root dry weight (RDW) and root oxidation activity (ROA) in both cultivars substantially increased in response to AWD.”
Claim · model-written summary
Alternate wetting and drying increased root oxidation activity in both rice cultivars.
- Taxon
- riceOryza sativae0
- Material
- Nipponbare, a lowland rice cultivar, and Gaoshan 1, an upland cultivare0
- Treatment
- AWDe0
- Outcome
- root oxidation activitye0
- Direction
- substantially increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two rice varieties, Nipponbare, a lowland rice cultivar, and Gaoshan 1, an upland cultivar, and found that root dry weight (RDW) and root oxidation activity (ROA) in both cultivars substantially increased in response to AWD.”
Claim · model-written summary
AWD responsive rice genes were mainly linked to lignin synthesis and phytohormone signaling and several transcription factor families.
- Taxon
- riceOryza sativat0
- Gene
- bHLH, bZIP, NAC, WRKY, and HSFe0
- Outcome
- AWD responsive genese0
- Qualifier
- lignin biosynthetic pathway and phytohormone signal transduction pathwaye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AWD responsive genes are mainly involved in lignin biosynthetic pathway and phytohormone signal transduction pathway and belong mainly to bHLH, bZIP, NAC, WRKY, and HSF transcription factor families.”
t0“rice”
The same questions in other papers
irrigation · growth · Oryza sativa (rice)Positive and negative results
221 papers in the same direction as this paper · 62 in the opposite direction · 7 reporting no difference from an alternative
- positive
- positive
- positive
287 papers more in this group
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