Responses of Photosynthesis, Chlorophyll Fluorescence and ROS-Scavenging Systems to Salt Stress During Seedling and Reproductive Stages in Rice

Moradi, Foad; Ismail, Abdelbagi M.

doi:10.1093/aob/mcm052

Cited by 586 publications

(444 citation statements)

References 20 publications

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“…This is also related to ion accumulation at toxic levels in photosynthetically active leaf cells (Tester and Davenport 2003). A decline in P N as a consequence of NaCl toxicity has been reported by several authors in different rice cultivars (Abdullah et al 2001;Dionisio-Sese and Tobita 2000;Djanaguiraman et al 2006;Moradi and Ismail 2007;Pieters and Nuñez 2008;Walia et al 2005;Welfare et al 1996) as well as in other cereal crops such as sorghum (Netondo et al 2004), wheat (Sharma et al 2005;Zheng et al 2009) and naked oat (Zhao et al 2007). In accordance with this, we observed that P N of both cultivars declined significantly under 150 mM NaCl during the vegetative growth (Fig.…”

Section: Discussionmentioning

confidence: 79%

“…Bomba and Bahia), i.e. the late vegetative growth and the reproductive stage, which has been shown to present different sensitivity to salt stress (Lutts et al 1995;Moradi and Ismail 2007;Rao et al 2008).…”

Section: Discussionmentioning

confidence: 99%

“…A better understanding of the morpho-physiological variations induced by salinity in crop plants should facilitate the identification of those involved in tolerance mechanisms. Rice (Oryza sativa L.) has been shown to be more saltsensitive at the seedling and reproductive stages than during the vegetative growth and active tillering (Abdullah et al 2001;Lutts et al 1995;Moradi and Ismail 2007;Rao et al 2008;Zeng and Shannon 2000b). Screening the pattern of responses to NaCl, therefore, should include not only seedlings but also the vegetative and reproductive stages.…”

Section: Introductionmentioning

confidence: 99%

“…/Cl -ions that are transported to the leaves under stress conditions, to protect physiologically active mesophyll cells (Tester and Davenport 2003). Ion accumulation, when reaching toxic levels in stressed plants, inhibit photosynthetic activity, whether grown in vitro or in combination with other culture conditions in the greenhouse (Cha-um et al 2006;Chaves et al 2009;Dionisio-Sese and Tobita 2000;Djanaguiraman et al 2006;Moradi and Ismail 2007;Netondo et al 2004).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2012

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“…Leaves were transferred into the NBT solution for 3 h, boiled in 80% ethanol for 10 min, and stored in 100% ethanol. The H 2 O 2 and MDA contents and CAT activity were determined as described by Moradi and Ismail (2007).…”

Section: Tunel Assaysmentioning

confidence: 99%

Mutation of OsNaPRT1 in the NAD Salvage Pathway Leads to Withered Leaf Tips in Rice

Ren

et al. 2016

Plant Physiol.

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Premature leaf senescence affects plant growth and yield in rice. NAD plays critical roles in cellular redox reactions and remains at a sufficient level in the cell to prevent cell death. Although numerous factors affecting leaf senescence have been identified, few involving NAD biosynthetic pathways have been described for plants. Here, we report the cloning and characterization of Leaf Tip Senescence 1 (LTS1) in rice (Oryza sativa), a recessive mutation in the gene encoding O. sativa nicotinate phosphoribosyltransferase (OsNaPRT1) in the NAD salvage pathway. A point mutation in OsNaPRT1 leads to dwarfism and the withered leaf tip phenotype, and the lts1 mutant displays early leaf senescence compared to the wild type. Leaf nicotinate and nicotinamide contents are elevated in lts1, while NAD levels are reduced. Leaf tissue of lts1 exhibited significant DNA fragmentation and H 2 O 2 accumulation, along with up-regulation of genes associated with senescence. The lts1 mutant also showed reduced expression of SIR2-like genes (OsSRT1 and OsSRT2) and increased acetylation of histone H3K9. Downregulation of OsSRTs induced histone H3K9 acetylation of senescence-related genes. These results suggest that deficiency in the NAD salvage pathway can trigger premature leaf senescence due to transcriptional activation of senescence-related genes.

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Quinoa: An Incan Crop to Face Global Changes in Agriculture

González

Eisa

Hussin

et al. 2015

Quinoa: Improvement and Sustainable Production

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Responses of Photosynthesis, Chlorophyll Fluorescence and ROS-Scavenging Systems to Salt Stress During Seedling and Reproductive Stages in Rice

Abstract: Upregulation of the anti-oxidant system appears to play a role in salt tolerance of rice, with tolerant genotypes also maintaining relatively higher photosynthetic function; during both the vegetative and reproductive stages.

Cited by 586 publications

References 20 publications

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

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

Mutation of OsNaPRT1 in the NAD Salvage Pathway Leads to Withered Leaf Tips in Rice

Quinoa: An Incan Crop to Face Global Changes in Agriculture

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