2024-03-28T20:20:35Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:02001424
2023-01-16T05:06:43Z
886:2329:2330
The promoted lateral root 1 (plr1) mutation is involved in reduced basal shoot starch accumulation and increased root sugars for enhanced lateral root growth in rice
Lucob-Agustin, Nonawin
Sugiura, Daisuke
Kano-Nakata, Mana
Hasegawa, Tomomi
Suralta, Roel R.
Niones, Jonathan M.
Inari-Ikeda, Mayuko
Yamauchi, Akira
Inukai, Yoshiaki
Rice
Lateral root
Mutant
Carbohydrates
Root system architecture
Starch accumulation
Lateral roots (LRs) are indispensable for plant growth, adaptability and productivity. We previously reported a rice mutant, exhibiting a high density of thick and long LRs (L-type LRs) with long parental roots and herein referred to as promoted lateral root1 (plr1). In this study, we describe that the mutant exhibited decreased basal shoot starch accumulation, suggesting that carbohydrates might regulate the mutant root phenotype. Further analysis revealed that plr1 mutation gene regulated reduced starch accumulation resulting in increased root sugars for the regulation of promoted LR development. This was supported by the exogenous glucose application that promoted L-type LRs. Moreover, nitrogen (N) application was found to reduce basal shoot starch accumulation in both plr1 mutant and wild-type seedlings, which was due to the repressed expression of starch biosynthesis genes. However, unlike the wild-type that responded to N treatment only at seedling stage, the plr1 mutant regulated LR development under low to increasing N levels, both at seedling and higher growth stages. These results suggest that plr1 mutation gene is involved in reduced basal shoot starch accumulation and increased root sugar level for the promotion of L-type LR development, and thus would be very useful in improving rice root architecture.
journal article
Elsevier
2020-12
application/pdf
Plant Science
301
110667
01689452
https://nagoya.repo.nii.ac.jp/record/2001424/files/20200902b_plr1_Plant_Science.pdf
eng
https://doi.org/10.1016/j.plantsci.2020.110667
© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/