Yagi Hiroki, Hara-Nishimura Ikuko, Ueda Haruko
Graduate School of Natural Science, Konan University, Kobe 658-8501, Japan.
Faculty of Science and Engineering, Konan University, Kobe 658-8501, Japan.
Quant Plant Biol. 2024 Nov 25;5:e9. doi: 10.1017/qpb.2024.12. eCollection 2024.
Plant postures are affected by environmental stimuli. When the gravitational direction changes, the mutants () and () exhibit aberrantly enhanced organ bending. Whether their phenotypes are due to the same mechanism is unknown. We characterized the primary root postures of these mutants. Their roots exhibited enhanced gravitropic bending with the same root-tip angles. The wavy roots of vertically grown plants were quantitatively evaluated using four indices. The straightness index (root base-to-tip length to total root-length ratio) was similar for and , and it slightly decreased for The curvature index was similar for and , but it decreased for , suggesting the ABCB19 deficiency caused the roots to curve more sharply. Combination of these indices for quantitative analyses of root postures may distinguish between similar wavy-root phenotypes and clarify genetic relationships.
植物的姿态受环境刺激影响。当重力方向改变时，突变体（）和（）表现出异常增强的器官弯曲。它们的表型是否源于相同机制尚不清楚。我们对这些突变体的初生根姿态进行了表征。它们的根表现出增强的向地性弯曲，且根尖角度相同。使用四个指标对垂直生长植物的波浪状根进行了定量评估。（某突变体1）和（某突变体2）的直线度指数（根基部到根尖长度与总根长度之比）相似，而（某突变体3）的该指数略有下降。（某突变体1）和（某突变体2）的曲率指数相似，但（某突变体3）的该指数下降，这表明ABCB19缺陷导致根弯曲得更急剧。这些用于根姿态定量分析的指标组合可能会区分相似的波浪状根表型，并阐明遗传关系。
