Glycinebetaine Accumulation, Physiological Characterizations and Growth Efficiency in Salt‐tolerant and Salt‐sensitive Lines of Indica Rice (<i>Oryza sativa</i>L. ssp.<i>indica</i>) in Response to Salt Stress

Cha–um, Suriyan; Supaibulwatana, Kanyaratt; Kirdmanee, Chalermpol

doi:10.1111/j.1439-037x.2007.00251.x

Cited by 96 publications

(48 citation statements)

References 57 publications

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“…), stomatal conductance (g s ; mmol m −2 s −1 ), transpiration rate (E; mmol m −2 s −1 ) and water use efficiency (WUE; %) were measured using a Portable Photosynthesis System (Model LI 6400, LI-COR®Inc, Lincoln, Nebraska, USA) with an Infrared Gas Analyser following Cha-um et al (2007). WUE was calculated according to the equation: WUE ¼ P n =E ½ Â100.…”

Section: Physiological Charactersmentioning

confidence: 99%

Transcriptional regulations of the genes of starch metabolism and physiological changes in response to salt stress rice (Oryza sativa L.) seedlings

Theerawitaya

Boriboonkaset

Cha–um

et al. 2012

Physiol Mol Biol Plants

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The aim of this investigation was to compare the transcriptional expression of starch metabolism, involving genes and physiological characters, in seedlings of two contrasting salt-tolerant rice genotypes, in response to saltstress. The soluble sugar content in rice seedlings of both salt-tolerant and salt-sensitive genotypes was enriched, relating to starch degradation, in plants subjected to 200 mM NaCl. In the salt-tolerant cultivar Pokkali, a major source of carbon may be that derived from the photosynthetic system and starch degradation. In starch degradation, only Pho and PWD genes in Pokkali were upregulated in plants subjected to salt stress. In contrast, the photosynthetic abilities of IR29 salt-susceptible cultivar dropped significantly, relating to growth reduction. The major source of carbohydrate in salt-stressed seedlings of the IR29 cultivar may be gained from starch metabolism, regulated by ADP-glucose pyrophosphorylase (AGP), starch synthase (SS), starch branching enzyme (SBE), starch debranching enzyme (ISA), glucan-water dikinase (GWD), dispropotionating enzyme (DPE), phospho glucan-water dikinase (PWD) and starch phosphorylase (Pho). Also, the major route of soluble sugar in salt-stressed Pokkali seedlings was derived from photosynthesis and starch metabolism. This was identified as novel information in the present study.

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Section: Physiological Charactersmentioning

confidence: 99%

Transcriptional regulations of the genes of starch metabolism and physiological changes in response to salt stress rice (Oryza sativa L.) seedlings

Theerawitaya

Boriboonkaset

Cha–um

et al. 2012

Physiol Mol Biol Plants

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“…4). Loss of chlorophyll pigment (Bahaji et al 2002;Siringam et al 2009) and reductions in the F v /F m ratio under salinity stress were also reported for other rice cultivars (Abdullah et al 2001;Cha-um et al 2007;Djanaguiraman et al 2006;Siringam et al 2009;Yamane et al 2008) as well as in sorghum (Netondo et al 2004), naked oat (Zhao et al 2007), wheat (Zheng et al 2009) and chickpea (Eyidogan and Ö z 2007).…”

Section: Discussionmentioning

confidence: 79%

Morpho-physiological variations in response to NaCl stress during vegetative and reproductive development of rice

et al. 2012

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The complex nature of plant resistance to adverse environmental conditions, such as salinity and drought requires a better understanding of the stress-induced changes that may be involved in tolerance mechanisms. Here we investigate stress-related morpho-physiological effects during vegetative and reproductive growth in two Japonica rice cultivars (Bomba and Bahia) exposed to a range of NaCl concentrations from the seedling stage. The stress-related detrimental effects were observed either earlier or to a higher extent in cv. Bomba than in Bahia. Damages to the photosynthetic apparatus were related to loss of chlorophyll (Chl) and to a decrease of the maximum potential efficiency of PSII (F v /F m ), affecting negatively net CO 2 assimilation rate (P N ). Stress-related leaf anatomical alterations were analysed during the vegetative and reproductive stages. The size of bulliform cells as well as dimensions related to the vascular system increased under mild stress but decreased in the longer term or under higher stress level. The pattern of the anatomical alterations observed at the reproductive stage under 20 mM NaCl was reflected in poor panicle development and yield loss, with effects more pronounced in cv. Bomba than in Bahia. In summary, our results show that some physiological and, particularly, leaf anatomical responses induced by NaCl stress are distinctive indicators of sensitivity to salt stress in rice cultivars.

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“…Net photosynthetic rate (P n ; µmol m -2 s -1 ), transpiration rate (E; mmol m -2 s -1 ), stomatal conductance (g s ; mmol H 2 O m -2 s -1 ) and water use efficiency (WUE; %) were measured using a Portable Photosynthesis System (Model LI 6400, LI-COR  Inc, Lincoln, Nebraska, USA) with an Infra-red Gas Analyser following Cha-um et al (2007). WUE was calculated according to equation: WUE (%) = [P n /E] × 100.…”

Section: Methodsmentioning

confidence: 99%

Water-deficit tolerant classification in mutant lines of indica rice

Cha–um

Yooyongwech

Supaibulwatana

2012

Sci. agric. (Piracicaba, Braz.)

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Water shortage is a major abiotic stress for crop production worldwide, limiting the productivity of crop species, especially in dry-land agricultural areas. this investigation aimed to classify the water-deficit tolerance in mutant rice (Oryza sativa L. spp. indica) genotypes during the reproductive stage. Proline content in the flag leaf of mutant lines increased when plants were subjected to water deficit. relative water content (rWC) in the flag leaf of different mutant lines dropped in relation to water deficit stress. A decrease rWC was positively related to chlorophyll a degradation. Chlorophyll a , chlorophyll b , total chlorophyll , total carotenoids , maximum quantum yield of PSII , stomatal conductance , transpiration rate and water use efficiency in mutant lines grown under water deficit conditions declined in comparison to the well-watered, leading to a reduction in net-photosynthetic rate. In addition, when exposed to water deficit, panicle traits, including panicle length and fertile grains were dropped. the biochemical and physiological data were subjected to classify the water deficit tolerance. NSG19 (positive control) and DD14 were identified as water deficit tolerant, and AA11, AA12, AA16, bb13, bb16, CC12, CC15, EE12, FF15, FF17, G11 and Ir20 (negative control) as water deficit sensitive, using Ward's method.

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Glycinebetaine Accumulation, Physiological Characterizations and Growth Efficiency in Salt‐tolerant and Salt‐sensitive Lines of Indica Rice (Oryza sativaL. ssp.indica) in Response to Salt Stress

Cited by 96 publications

References 57 publications

Transcriptional regulations of the genes of starch metabolism and physiological changes in response to salt stress rice (Oryza sativa L.) seedlings

Transcriptional regulations of the genes of starch metabolism and physiological changes in response to salt stress rice (Oryza sativa L.) seedlings

Morpho-physiological variations in response to NaCl stress during vegetative and reproductive development of rice

Water-deficit tolerant classification in mutant lines of indica rice

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