ITHENTICATE: Morpho-physiological Response of Oryza Glaberrima to Gradual Soil Drying

Kartika, Kartika and Sakagami, Jun-Ichi and Lakitan, Benyamin and Yabuta, Shin and Wijaya, Andi and Kadir, Sabaruddin and Widuri, Laily Ilman and Siaga, Erna and Nakao, Yoshihiro (2021) ITHENTICATE: Morpho-physiological Response of Oryza Glaberrima to Gradual Soil Drying. Elsevier, Rice Science.

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Soil drought occurrence during dry season has been the main constraint, besides prolonged flooding during rainy season, in increasing cropping intensity and rice productivity in tropical riparian wetland. Use of drought tolerant rice genotype might be a suitable option for overcoming such problem. This study focused on the effects of gradual soil drying during early vegetative growth stage on morphological and physiological traits of five Oryza glaberrima genotypes, namely RAM12, RAM14, RAM59, RAM97 and RAM101, and two Oryza sativa subsp japonica genotypes, i.e. Koshihikari and Minamihatamochi. The plants were subjected to 6 d of gradual soil drying condition from 15 days after transplanting (DAT) to 20 DAT, and were allowed to recover until 22 DAT. Gradual soil drying reduced plant growth as indicated by dry mass accumulation. Drought reduced stomatal conductance and increased leaf rolling score of all the genotypes. All the genotypes showed comparable response on stomatal conductance, but O. glaberrima genotypes performed higher in leaf rolling recovery. Meanwhile, O. sativa genotypes decreased total leaf area and specific leaf area, but increased specific leaf weight in order to avoid further damages due to drought stress. Drought tolerance mechanisms in RAM101, RAM12, RAM59 and RAM14 were associated with leaf morpho-physiological responses, root traits and dry biomass accumulation.

Item Type: Other
Subjects: #3 Repository of Lecturer Academic Credit Systems (TPAK) > Results of Ithenticate Plagiarism and Similarity Checker
Divisions: 05-Faculty of Agriculture > 54001-Agricultural Science (S3)
Depositing User: Ph.D. Sabaruddin Kadir
Date Deposited: 27 Apr 2023 05:38
Last Modified: 27 Apr 2023 05:38

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