Photosynthetic Performance in Improved ‘KDML105’ Rice (Oryza sativa L.) Lines Containing Drought and Salt Tolerance Genes under Drought and Salt Stress

Pamuta, Dechudom; Siangliw, Meechai; Sanitchon, Jirawat; Pengrat, Jarunjit; Siangliw, Jonaliza L.; Toojinda, Theerayut; Theerakulpisut, Piyada

doi:10.47836/pjtas.43.4.17

Cited by 6 publications

(11 citation statements)

References 56 publications

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“…Non-significant differences in chlorophyll fluorescence on Tubtim Chumphae rice seedlings and early vegetative stage in this study concurred with previous reports that this occurrence indicated that PSII was unaffected by salinity stress 30 . However, previous studies reported that salinity stress decreased chlorophyll fluorescence in many plant species such as rice 31 and wheat 32 .…”

Section: Discussionmentioning

confidence: 89%

Salinity Tolerance Evaluation of Rice (Oryza sativa L.) ‘Tubtim Chumphae’ Seedling and Early Vegetative Stage

Taratima¹,

Chaisuwan²,

Plaikhunto³

et al. 2023

Asian J. of Plant Sciences

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Background and Objective: Salinity is abiotic stress that affects rice growth and results in lower yields. This research studied the effects of salinity on Tubtim Chumphae rice growth. Materials and Methods: Seedlings were cultivated for 35 days in the soil before being stressed by salinity (0, 25, 50, 75 and 100 mM NaCl) for 4 weeks. Growth performance and some physiological traits were recorded weekly for 4 weeks. Results: Under salinity stress, fresh and dry weight of shoot and root, relative dry weight, plant length and root length all decreased as salt solution concentration increased. Electrolyte leakage percentage and malondialdehyde content increased when rice was exposed to the salt solution for 4 weeks, indicating that high salinity damaged the lipid membrane. The PCA results revealed positive correlations among growth parameters that negatively correlated with MDA content and electrolyte leakage. The HCA results confirmed the PCA biplot showing decreasing expression of growth parameters with rising salt stress levels, while MDA content and electrolyte leakage continuously increased. Results suggested MDA content and electrolyte leakage as indicators for salt stress in Tubtim Chumphae rice at seedling and early vegetative stage. Conclusion: Findings in this study indicated that Tubtim Chumphae rice plants can grow in slight to moderate salinity soil. Results will deliver advantageous data that can be integrated with additional agronomical characters in rice growth or breeding plans for abiotic stress-tolerant cultivars improvement.

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Section: Discussionmentioning

confidence: 89%

Salinity Tolerance Evaluation of Rice (Oryza sativa L.) ‘Tubtim Chumphae’ Seedling and Early Vegetative Stage

Taratima¹,

Chaisuwan²,

Plaikhunto³

et al. 2023

Asian J. of Plant Sciences

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“…The parent DH103 is a rice variety derived from a double haploid (DH) population from a cross between an indica variety, IR62266, and a japonica variety, CT9993 [49]. DH103 has been used as a donor for several abiotic stresses, e.g., drought tolerance and salt tolerance [50]. However, the use of this rice variety for dirty panicle disease resistance has not been reported.…”

Section: Discussionmentioning

confidence: 99%

QTL-seq Identifies Genomic Regions Associated with Resistance to Dirty Panicle Disease in Rice

et al. 2023

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Dirty panicle disease is one of the most important diseases that can cause yield losses in rice production. Despite the severity of the disease, the molecular basis of resistance to the pathogen is poorly understood. Using QTL-seq with an F2 population, we identified three genomic regions on chromosomes 1, 9, and 10, namely qDP1, qDP9, and qDP10. These regions are significantly associated with resistance to dirty panicle disease caused by two fungal pathogens, Bioplaris oryzae and Cirvularia lunata. qDP1 was significantly associated only with resistance to B. oryzae, whereas qDP9 and qDP10 were significantly associated with both B. oryzae and C. lunata. We also developed KASP markers for each QTL detected and validated them in the F2 population. The markers were able to explain phenotypic variation in a range of 5.87–15.20%. Twelve potential candidate genes with annotated functions as resistance-related genes were proposed. These candidate genes include those encoding RLK, MATE, WAK, NBS-LRR, subtilisin-like protease, and ankyrin repeat proteins. The results of this study provide insights into the genetic mechanism of dirty panicles in rice and will be useful for future breeding programs for dirty panicle resistance. This is the first report of QTLs associated with resistance to dirty panicle disease in rice.

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“…The ability of various plant tissues to retain K + under stress conditions has been recognized as a novel and essential mechanism of salinity stress tolerance in plants (Shabala et al, 2016;Wu et al, 2018). W hile K + limitation in rice decreases net photosynthetic rate and stomatal conductance damaging PS-II reactions (Pamuta et al, 2020). Nonetheless, sodium-potassium ratio determines their synergistic or antagonistic response.…”

Section: Introductionmentioning

confidence: 99%

Potassium Nutrition in Rice (Oryza sativa L.) for Higher Yield with Lower Sodium Uptake under Saline Conditions of Central Vietnam

Trinh,

Hoang,

et al. 2024

IJARe

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Background: Potassium (K) is an essential macronutrient, improves rice yield and contributes to salt stress tolerance. This study determined the best potassium (K) application level on yield formation and the saline resistance capability of rice under salinity field conditions of central Vietnam. Methods: Experiments were comprised of five K fertilizer application rates (0, 25, 50, 75 and 100 kg K2O/ha) and two rice varieties, viz, OM8104 and MNR3 for two growing seasons of 2021 and 2022. All treatments were arranged in a split-plot design with 3 replicates in Duy Vinh commune, Duy Xuyen district, Quang Nam province. Result: Potassium application affected the number of panicles per unit area, filled grain per panicle and actual grain yield of both rice varieties in both seasons under saline condition. Application of 50 kg K2O/ha reduced the soil salinity over the monitoring periods compared to the other K rates. EC values of soil were significantly higher during the hot season than the wet season showing high temperature effects. Application of 50 kg K2O/ha also accumulated maximum dry matter at different crop stages and produced the highest rice yield with 7.57 and 5.25 tons/ha for OM8104 and 7.35 and 5.18 tons/ha for MNR3 in both wet and hot seasons respectively. The harvest index could not affect significantly by K application irrespective of seasons and varieties. These increases in actual grain yields using 50 kg K2O/ha were attributed to increased filled grains per panicle, accumulation of high K+ content and K+/Na+ ratios in rice varieties in both seasons under saline field condition.

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Photosynthetic Performance in Improved ‘KDML105’ Rice (Oryza sativa L.) Lines Containing Drought and Salt Tolerance Genes under Drought and Salt Stress

Cited by 6 publications

References 56 publications

Salinity Tolerance Evaluation of Rice (Oryza sativa L.) ‘Tubtim Chumphae’ Seedling and Early Vegetative Stage

Salinity Tolerance Evaluation of Rice (Oryza sativa L.) ‘Tubtim Chumphae’ Seedling and Early Vegetative Stage

QTL-seq Identifies Genomic Regions Associated with Resistance to Dirty Panicle Disease in Rice

Potassium Nutrition in Rice (Oryza sativa L.) for Higher Yield with Lower Sodium Uptake under Saline Conditions of Central Vietnam

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