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Photosynthesis Performance at Different Growth Stages, Growth, and Yield of Rice in Saline Fields

Photosynthetic performance and biomass at different growth stages of the salt-sensitive KDML105 rice cultivar, three improved lines (RD73, CSSL8-94, and TSKC1-144), and the salt-tolerant standard genotype (Pokkali) were investigated under non-saline, semi-saline, and the heavy-saline field condition...

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Autores principales: Santanoo, Supranee, Lontom, Watanachai, Dongsansuk, Anoma, Vongcharoen, Kochaphan, Theerakulpisut, Piyada
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10181347/
https://www.ncbi.nlm.nih.gov/pubmed/37176961
http://dx.doi.org/10.3390/plants12091903
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author Santanoo, Supranee
Lontom, Watanachai
Dongsansuk, Anoma
Vongcharoen, Kochaphan
Theerakulpisut, Piyada
author_facet Santanoo, Supranee
Lontom, Watanachai
Dongsansuk, Anoma
Vongcharoen, Kochaphan
Theerakulpisut, Piyada
author_sort Santanoo, Supranee
collection PubMed
description Photosynthetic performance and biomass at different growth stages of the salt-sensitive KDML105 rice cultivar, three improved lines (RD73, CSSL8-94, and TSKC1-144), and the salt-tolerant standard genotype (Pokkali) were investigated under non-saline, semi-saline, and the heavy-saline field conditions in the northeast of Thailand. In the non-saline field, net photosynthesis rates (P(n)) of all genotypes remained high from the early vegetative stage to the milky stage and then dramatically reduced at maturity. In contrast, in both saline fields, P(n) was the highest at the early vegetative stage and continuously declining until maturity. Leaf chlorophyll content remained high from the early vegetative to milky stage then reduced at maturity for all three field conditions. During the reproductive phase, P(n) of KDML105 and the improved lines were reduced by 4–17% in the heavy-saline field, while that of Pokkali was increased (11–19% increase over that of the non-saline). Pokkali also showed a prominent increase in water use efficiency (WUE) under salinity. Nevertheless, rice leaves under saline conditions maintained the PSII integrity, as indicated by the pre-dawn values of maximum quantum yield of PSII photochemistry (F(v)/F(m)) of higher than 0.8. Pokkali under the semi-saline and the heavy-saline conditions exhibited 51% and 27% increases in final biomass, and 64% and 42% increases in filled grain weight plant(−1), respectively. In the semi-saline condition, RD73, TSKC1-144, CSSL8-94, and KDML105 showed moderate salt tolerance by displaying 24%, 18.6%, 15%, and 11.3% increases in final biomass, and 24%, 4%, 13%, and 6% increases in filled grain weight plant(−1), respectively. In contrast, in the heavy-saline field, final biomass of RD73, KDML105, CSSL8-94, and TSKC1-144 showed 48%, 45%, 38%, and 36% reductions from that in the non-saline field, while the filled grain weight plant(−1) were reduced by 45%, 58%, 35%, and 32%, respectively. This indicated that the improved lines carrying drought- and/or salt-tolerance genes achieved an increased salt tolerance level than the parental elite cultivar, KDML105.
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spelling pubmed-101813472023-05-13 Photosynthesis Performance at Different Growth Stages, Growth, and Yield of Rice in Saline Fields Santanoo, Supranee Lontom, Watanachai Dongsansuk, Anoma Vongcharoen, Kochaphan Theerakulpisut, Piyada Plants (Basel) Article Photosynthetic performance and biomass at different growth stages of the salt-sensitive KDML105 rice cultivar, three improved lines (RD73, CSSL8-94, and TSKC1-144), and the salt-tolerant standard genotype (Pokkali) were investigated under non-saline, semi-saline, and the heavy-saline field conditions in the northeast of Thailand. In the non-saline field, net photosynthesis rates (P(n)) of all genotypes remained high from the early vegetative stage to the milky stage and then dramatically reduced at maturity. In contrast, in both saline fields, P(n) was the highest at the early vegetative stage and continuously declining until maturity. Leaf chlorophyll content remained high from the early vegetative to milky stage then reduced at maturity for all three field conditions. During the reproductive phase, P(n) of KDML105 and the improved lines were reduced by 4–17% in the heavy-saline field, while that of Pokkali was increased (11–19% increase over that of the non-saline). Pokkali also showed a prominent increase in water use efficiency (WUE) under salinity. Nevertheless, rice leaves under saline conditions maintained the PSII integrity, as indicated by the pre-dawn values of maximum quantum yield of PSII photochemistry (F(v)/F(m)) of higher than 0.8. Pokkali under the semi-saline and the heavy-saline conditions exhibited 51% and 27% increases in final biomass, and 64% and 42% increases in filled grain weight plant(−1), respectively. In the semi-saline condition, RD73, TSKC1-144, CSSL8-94, and KDML105 showed moderate salt tolerance by displaying 24%, 18.6%, 15%, and 11.3% increases in final biomass, and 24%, 4%, 13%, and 6% increases in filled grain weight plant(−1), respectively. In contrast, in the heavy-saline field, final biomass of RD73, KDML105, CSSL8-94, and TSKC1-144 showed 48%, 45%, 38%, and 36% reductions from that in the non-saline field, while the filled grain weight plant(−1) were reduced by 45%, 58%, 35%, and 32%, respectively. This indicated that the improved lines carrying drought- and/or salt-tolerance genes achieved an increased salt tolerance level than the parental elite cultivar, KDML105. MDPI 2023-05-07 /pmc/articles/PMC10181347/ /pubmed/37176961 http://dx.doi.org/10.3390/plants12091903 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Santanoo, Supranee
Lontom, Watanachai
Dongsansuk, Anoma
Vongcharoen, Kochaphan
Theerakulpisut, Piyada
Photosynthesis Performance at Different Growth Stages, Growth, and Yield of Rice in Saline Fields
title Photosynthesis Performance at Different Growth Stages, Growth, and Yield of Rice in Saline Fields
title_full Photosynthesis Performance at Different Growth Stages, Growth, and Yield of Rice in Saline Fields
title_fullStr Photosynthesis Performance at Different Growth Stages, Growth, and Yield of Rice in Saline Fields
title_full_unstemmed Photosynthesis Performance at Different Growth Stages, Growth, and Yield of Rice in Saline Fields
title_short Photosynthesis Performance at Different Growth Stages, Growth, and Yield of Rice in Saline Fields
title_sort photosynthesis performance at different growth stages, growth, and yield of rice in saline fields
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10181347/
https://www.ncbi.nlm.nih.gov/pubmed/37176961
http://dx.doi.org/10.3390/plants12091903
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