Study of Water Stress Effects in Different Growth Stages on Yield and Yield Components of Different Rice (Oryza sativa L.) Cultivars

Sarvestani, Z Tahmasebi; Pirdashti, Hemmatollah; Sanavy, Seyed Ali Mohammad Modarres; Balouchi, Hamidreza

doi:10.3923/pjbs.2008.1303.1309

Cited by 89 publications

(17 citation statements)

References 16 publications

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“…However, drought symptoms were expressed at the flowering (all genotype groups) and maturity stages (interspecific lines and O. sativa). Delay in flowering and maturity in response to drought is typical for rice (Zinolabedin et al, 2008). Our study additionally indicated that there was a varietal difference in the duration of the delay of these traits; some rice genotypes with the same flowering or maturity period under the control conditions had different delay periods under the drought conditions.…”

Section: Discussionsupporting

confidence: 60%

“…In drought conditions, rice plants lose turgor potential and show various symptoms, such as leaf wilting, leaf rolling (which is an expression of wilting), leaf desiccation, leaf tip burning, leaf drooping, and leaf drop (Zinolabedin et al, 2008). In this study, leaf rolling and leaf tip burning were observed only in drought-stressed plants as a consequence of water shortage.…”

Section: Discussionmentioning

confidence: 56%

“…The latter paper indicated that the performance of a trait under control conditions could be used to predict its performance under drought conditions. As Zinolabedin et al (2008) report, drought stress during the reproductive stage can more strongly affect yield. If the drought treatment is imposed in that stage, different results could be obtained.…”

Section: Discussionmentioning

confidence: 88%

“…It occurs frequently and is one of the major reasons behind the wide fluctuations in rice production, especially when it coincides with the reproductive phase of the crop during panicle initiation and anthesis (Price and Courtois, 1999). Zinolabedin et al (2008) reported mean grain yield reduction of 21, 50, and 21% t ha -1 due to drought during vegetative, flowering, and grain-filling stages, respectively. Worldwide, drought affects approximately 23 million ha of rainfed rice (Serraj and Atlin, 2008).…”

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confidence: 99%

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Field Evaluation of Rice Genotypes from the Two Cultivated Species (Oryza sativa L. and Oryza glaberrima Steud.) and Their Interspecifics for Tolerance to Drought

et al. 2012

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A total of 327 rice {Oryza spp.) genotypes were screened for tolerance to drought af the Africa Rice Center in Cotonou, Benin, in 2007 and. Plants were subjected to full irrigation fronn sowing to harvest or to 21-d drought from 34 d after sowing. Drought-affected plants showed narrower leaves, reduced grain yield, and shorter stature. Tillering and plant maturity were negatively affected by drought whereas values for leaf temperature and leaf greenness were significantly higher under drought than under control condition. Under control condition, for 54% of genotypes, flowering occurred between 71 and 90 d after sowing. But under drought, flowering occurred af 90 or more days after sowing for fhe majority of genotypes. Significant genotype x environment interactions were observed for plant height, leaf greenness, flowering, grain yield, maturity, leaf rolling, and leaf tip burning. More traits were correlated with grain yield under drought for Oryza glaberrima Steud. than for other genotype groups. No relationship was observed between plant recovery ability and all other traits selected. More than 90% of plants evaluated resumed growth after drought in both years. TOG6208, TOG5691, TOG5591, TOG6594, and RAM122 were identified as best performing genotypes in terms of grain yield under drought. Their performance was similar fo that of most of fhe 24 top yielding in terms of leaf rolling, leaf tip burning, and plant recovery after drought release.

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Section: Discussionsupporting

confidence: 60%

Section: Discussionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 88%

mentioning

confidence: 99%

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Field Evaluation of Rice Genotypes from the Two Cultivated Species (Oryza sativa L. and Oryza glaberrima Steud.) and Their Interspecifics for Tolerance to Drought

et al. 2012

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“…Drought stress inhibits cell division and cell growth, which lead to inhibition of plant growth and development (Sarvestani et al, 2008). Plant under drought stress develops physiological and genetic adaptation.…”

Section: Discussionmentioning

confidence: 99%

Morpho-Physiological and Genetic Responses of Bali Local Rice Cultivars to Drought Stress at Seedling Stage

Pharmawati

Wrasiati

2018

OnLine Journal of Biological Sciences

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Rice is the main food source in many countries in the world. One of the major limiting factors for rice growth and productivity is drought stress. In Bali there are several local rice cultivars, two of them are 'Mansur' and 'Putih Cempaka'. The cultivar 'IR 64' is one rice cultivar released by IRRI. The responses of those rice cultivars to drought stress were tested. This study aimed to analyze growth responses and expression of DREB and SOD genes under drought stress induced by PEG. Rice seedlings were grown in a hydroponic system. Two weeks old seedlings were treated with PEG 20% (-0.49 MPa) and 30% (-1.03 MPa) for three days. Root to shoot ratio was calculated and chlorophyll content was measured. RNA was extracted from the shoot. Semi-quantitative real-time PCR was conducted and the products were visualized using 1% agarose gel electrophoresis. The result showed that root to shoot ratio increased as PEG concentration increased in all rice cultivars tested. The chlorophyll content decrease under PEG treatments in all rice cultivars. The expression of Superoxide Dismutase (Cu/Zn-SOD) gene increased under drought treatmentsin 'Mansur' and 'Putih Cempaka', while in 'IR64' using SOD primer tested, the gene was not expressed. The expression of DehydrationResponsive Element Binding (DREB1) gene increased under PEG treatments both in 'Mansur' and 'Putih Cempaka'.

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Breeding crop plants for drought tolerance

Wimalasekera

2016

Water Stress and Crop Plants

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Study of Water Stress Effects in Different Growth Stages on Yield and Yield Components of Different Rice (Oryza sativa L.) Cultivars

Cited by 89 publications

References 16 publications

Field Evaluation of Rice Genotypes from the Two Cultivated Species (Oryza sativa L. and Oryza glaberrima Steud.) and Their Interspecifics for Tolerance to Drought

Field Evaluation of Rice Genotypes from the Two Cultivated Species (Oryza sativa L. and Oryza glaberrima Steud.) and Their Interspecifics for Tolerance to Drought

Morpho-Physiological and Genetic Responses of Bali Local Rice Cultivars to Drought Stress at Seedling Stage

Breeding crop plants for drought tolerance

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