Diversity of salt tolerance in Vigna riukiuensis.
- 1Research Center of Genetic Resources, National Agriculture and Food Research Organization, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan.
- 2Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa City, Chiba 277-8561, Japan.
- 3Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-8657, Japan.
Abstract
Vigna riukiuensis is one of the most salt-tolerant species within the genus Vigna, yet intraspecific variation in its salt tolerance remains uncharacterized. In this study, we evaluated 61 accessions of V. riukiuensis under 200 mM NaCl using effective quantum yield (Y(II)) as an indicator of salt tolerance. Accessions were classified into five clusters, showing substantial variation that accessions in the tolerant group maintained Y(II) for four weeks whereas those in the sensitive group lost Y(II) in a week. We repeated the Y(II)-based classification for a subset of accessions and the results generally reproduced that of the first evaluation. In addition, we measured Na⁺ and K⁺ allocation in roots, stems and leaves and found the pattern of Na⁺ allocation greatly varied even within the most tolerant accessions whereas the pattern of K⁺ allocation, not the Na⁺/K⁺ ratio, showed a minor correlation with salt tolerance. Interestingly, JP254554 restricted Na⁺ transport from roots to leaves, but it did not develop Casparian strips even under salt stress. This study provides the first comprehensive assessment of intraspecific variation in V. riukiuensis, identifying promising donor accessions for breeding, and highlighting various unknown mechanisms to be elucidated in the future.
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BibTeX
@article{wang2026diversity,
title = {{Diversity of salt tolerance in Vigna riukiuensis.}},
author = {Fanmiao Wang and Yurie Iki and Keitaro Tanoi and Ken Naito},
journal = {Breeding science},
year = {2026},
month = jun,
doi = {10.1270/jsbbs.25064},
url = {https://europepmc.org/article/MED/42936377},
note = {CC BY},
}
RIS
TY - JOUR
TI - Diversity of salt tolerance in Vigna riukiuensis.
AU - Fanmiao Wang
AU - Yurie Iki
AU - Keitaro Tanoi
AU - Ken Naito
PY - 2026
DA - 2026/06/11
JO - Breeding science
DO - 10.1270/jsbbs.25064
UR - https://europepmc.org/article/MED/42936377
AB - Vigna riukiuensis is one of the most salt-tolerant species within the genus Vigna, yet intraspecific variation in its salt tolerance remains uncharacterized. In this study, we evaluated 61 accessions of V. riukiuensis under 200 mM NaCl using effective quantum yield (Y(II)) as an indicator of salt tolerance. Accessions were classified into five clusters, showing substantial variation that accessions in the tolerant group maintained Y(II) for four weeks whereas those in the sensitive group lost Y(II) in a week. We repeated the Y(II)-based classification for a subset of accessions and the results generally reproduced that of the first evaluation. In addition, we measured Na⁺ and K⁺ allocation in roots, stems and leaves and found the pattern of Na⁺ allocation greatly varied even within the most tolerant accessions whereas the pattern of K⁺ allocation, not the Na⁺/K⁺ ratio, showed a minor correlation with salt tolerance. Interestingly, JP254554 restricted Na⁺ transport from roots to leaves, but it did not develop Casparian strips even under salt stress. This study provides the first comprehensive assessment of intraspecific variation in V. riukiuensis, identifying promising donor accessions for breeding, and highlighting various unknown mechanisms to be elucidated in the future.
SN - 1344-7610
SN - 1347-3735
ER -