Rice Production in Farmer Fields in Soil Salinity Classified Areas in Khon Kaen, Northeast Thailand

Yi, Yang; Ye, Rongling; Srisutham, Mallika; Nontasri, Thanyaluck; Sritumboon, Supranee; Maki, Masayasu; Yoshida, Koshi; Oki, K.; Homma, Koki

doi:10.3390/su14169873

Cited by 9 publications

(6 citation statements)

References 26 publications

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“…Growth reduction in the heavy-saline field was attributed to an inhibition of cell division and enlargement due to osmotic and ion toxicity effects, and inadequate photoassimilate supply [10], resulting in the lowest tiller number (Figure S1), and, consequently, the lowest total dry weight in all plant parts (Table S3) and the lowest yield and yield components (Table 5). Negative effects of soil EC on tiller number, biomass, and yield were reported in both greenhouse [18] and saline paddy fields [51,52]. Although Pokkali growing in the non-saline field had the lowest total biomass at maturity among genotypes, its total biomass in the heavy-saline field became the highest.…”

Section: Discussionmentioning

confidence: 97%

“…For all rice genotypes, the low soil EC during the milky stage to maturity (1.28-4.05 dS m −1 ; Figure 1D) also resulted in greater filled grain weight plant −1 in the semi-saline compared to that in the non-and heavy-saline fields (Table 5). Therefore, growth and grain yield of rice under saline field conditions varied widely depending not only on the soil properties but also the climatic conditions, especially the precipitation [51,57].…”

Section: Discussionmentioning

confidence: 99%

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

Santanoo

Lontom

Dongsansuk

et al. 2023

Plants

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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 (Pn) 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, Pn 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, Pn 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 (Fv/Fm) 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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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

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

Santanoo

Lontom

Dongsansuk

et al. 2023

Plants

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“…After drought, salinity is the second most common soil problem in rice-cultivating countries and has become a serious obstacle to improving global rice production [ 21 ]. More than 50% of arable lands may be lost to serious salinization by the year 2050, making it difficult to secure rice production and exacerbating food shortages [ 22 ]. Although rice salt tolerance has been improved by molecular biological techniques in recent years [ 23 , 24 ], surprisingly little is known about the mechanistic basis of the salt response.…”

Section: Discussionmentioning

confidence: 99%

Genome-Wide Analysis of microRNAs and Their Target Genes in Dongxiang Wild Rice (Oryza rufipogon Griff.) Responding to Salt Stress

Chen

Yang

Gao

et al. 2023

IJMS

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Rice (Oryza sativa) is a staple food for more than half of the world’s population, and its production is critical for global food security. Moreover, rice yield decreases when exposed to abiotic stresses, such as salinity, which is one of the most detrimental factors for rice production. According to recent trends, as global temperatures continue to rise due to climate change, more rice fields may become saltier. Dongxiang wild rice (Oryza rufipogon Griff., DXWR) is a progenitor of cultivated rice and has a high tolerance to salt stress, making it useful for studying the regulatory mechanisms of salt stress tolerance. However, the regulatory mechanism of miRNA-mediated salt stress response in DXWR remains unclear. In this study, miRNA sequencing was performed to identify miRNAs and their putative target genes in response to salt stress in order to better understand the roles of miRNAs in DXWR salt stress tolerance. A total of 874 known and 476 novel miRNAs were identified, and the expression levels of 164 miRNAs were found to be significantly altered under salt stress. The stem-loop quantitative real-time PCR (qRT-PCR) expression levels of randomly selected miRNAs were largely consistent with the miRNA sequencing results, suggesting that the sequencing results were reliable. The gene ontology (GO) analysis indicated that the predicted target genes of salt-responsive miRNAs were involved in diverse biological pathways of stress tolerance. This study contributes to our understanding of DXWR salt tolerance mechanisms regulated by miRNAs and may ultimately improve salt tolerance in cultivated rice breeding using genetic methods in the future.

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“…The seawater intrusion on agricultural soil properties in Nonthaburi increased the electric conductivity (EC) and sodium adsorption ratio (SAR) to approximately 0.21-4.38 dS m −1 and 8.29-41.89, respectively, which are higher than the annual average value [7]. Moreover, in the northeast of Thailand, approximately 17% of its land area is affected by salt from rock salt and the accumulated effects from human activities [8]. The effect of high salinity is continuing to expand in some regions, thus potentially threatening rice production in Thailand.…”

Section: Introductionmentioning

confidence: 99%

Association of a Specific OsCULLIN3c Haplotype with Salt Stress Responses in Local Thai Rice

Herwibawa,

Lekklar,

Chadchawan

et al. 2024

IJMS

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We previously found that OsCUL3c is involved in the salt stress response. However, there are no definitive reports on the diversity of OsCUL3c in local Thai rice. In this study, we showed that the CUL3 group was clearly separated from the other CUL groups; next, we focused on OsCUL3c, the third CUL3 of the CUL3 family in rice, which is absent in Arabidopsis. A total of 111 SNPs and 28 indels over the OsCUL3c region, representing 79 haplotypes (haps), were found. Haplotyping revealed that group I (hap A and hap C) and group II (hap B1 and hap D) were different mutated variants, which showed their association with phenotypes under salt stress. These results were supported by cis-regulatory elements (CREs) and transcription factor binding sites (TFBSs) analyses. We found that LTR, MYC, [AP2; ERF], and NF-YB, which are related to salt stress, drought stress, and the response to abscisic acid (ABA), have distinct positions and numbers in the haplotypes of group I and group II. An RNA Seq analysis of the two predominant haplotypes from each group showed that the OsCUL3c expression of the group I representative was upregulated and that of group II was downregulated, which was confirmed by RT-qPCR. Promoter changes might affect the transcriptional responses to salt stress, leading to different regulatory mechanisms for the expression of different haplotypes. We speculate that OsCUL3c influences the regulation of salt-related responses, and haplotype variations play a role in this regulation.

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Rice Production in Farmer Fields in Soil Salinity Classified Areas in Khon Kaen, Northeast Thailand

Cited by 9 publications

References 26 publications

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

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

Genome-Wide Analysis of microRNAs and Their Target Genes in Dongxiang Wild Rice (Oryza rufipogon Griff.) Responding to Salt Stress

Association of a Specific OsCULLIN3c Haplotype with Salt Stress Responses in Local Thai Rice

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