Variation in root system architecture and drought response in rice (Oryza sativa): Phenotyping of the OryzaSNP panel in rainfed lowland fields
By A. Henry, Veeresh R. P. Gowda, R. Torres, Kenneth L. McNally, R. Serraj. Field crops research (Print), 2011
299 citations recorded by the source corpus.
Abstract Root growth at soil depths below 30 cm may provide access to critical soil water reserves during drought in rainfed lowland rice. In this study, the OryzaSNP panel, a set of 20 lines representing genetic diversity in rice used for the discovery of DNA sequence polymorphisms, was evaluated for root characteristics in the field over three seasons varying in drought severity. Root length density (RLD) at a depth of 30–45 cm varied up to 74–92% among genotypes under drought stress (2008–2009 dry seasons), ranging from 0.024 to 0.23 cm cm −3 in 2008 and from 0.19 to 0.81 cm cm −3 in 2009. Real-time monitoring of soil moisture profiles revealed significant differences among genotypes, and these differences were correlated with RLD at those soil depths. Among the lines evaluated, the Aus isozyme group, particularly the genotype Dular, showed greater drought resistance associated with deep root growth and the highest drought response index (less reduction in yield by drought stress). Since the set of genotypes used in this study has been completely sequenced for SNP markers, the phenotypic information on root growth and drought avoidance responses presented here could be used in initial analysis of the genetic basis of dehydration avoidance traits and in facilitating improvement in drought resistance in rice.
Subfields: Plant Science
View Paper: https://www.semanticscholar.org/paper/c8cfe0cc996dcc4ef68ee0f7cdf8ff84a23047b3
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In Plant Science
Citations in the corpus
- Bridging the Rice Yield Gaps under Drought: QTLs, Genes, and their Use in Breeding Programs (2017, background): “The developed drought-tolerant lines possessed earliness, root plasticity traits, greater root length density, better water-use efficiency mechanism, better regulation of shoot growth [106,121,181], and a yield advantage of 0.”
- Adoption and economics of alternate wetting and drying water management for irrigated lowland rice. (2015, background): “The roots are still most dense at the shallow part of the soil, but drought stress increased the root distribution with depth as it became more severe (Henry et al., 2011).”
- Traits and selection strategies to improve root systems and water uptake in water-limited wheat crops. (2012, background): “In rice, varieties with increased root length density in the 35–45 cm layer had improved resistance to drought (Henry et al., 2011).”
- Stomatal Responses to Drought Stress and Air Humidity (2011, background): “To survive such conditions plants have developed growth strategies such as increased water use efficiency with C4- or CAM metabolism (Keeley and Rundel, 2003), succulent growth and extensive root systems (Henry et al., 2011).”
- Root biology and genetic improvement for drought avoidance in rice (2011, background): “Other comparisons among rice varieties (Thanh et al., 1999; Azhiri-Sigari et al., 2000; Kondo et al., 2003; Matsuo and Mochizuki, 2009a; Uga et al., 2009; Henry et al., 2011) further reflect the genetic diversity for root traits in rice.”
- Root Phenotyping for Drought Tolerance: A Review (2018, background): “Coarse or tap roots give anchorage to plants and establish root system architecture, control root system depth, and thus, determines a plant’s ability to grow under a compacted soil profile [47].”
- Comprehending crystalline β-carotene accumulation by comparing engineered cell models and the natural carotenoid-rich system of citrus (2011, unknown): “Differences in phenology were apparent in the field, which could affect water uptake dynamics, and these genotypes have been previously characterized to differ in root growth at depth (Lafitte et al., 2001; Henry et al., 2011).”
- Comparison of drought tolerance of maize, sweet sorghum and sorghum-Sudangrass hybrids (2014, background): “However, even on shallow soils, the higher RLD of sorghum may be an advantage over maize, because a high RLD can improve water uptake and drought resistance (Henry et al. 2011, Wasson et al. 2012).”