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JULGI-mediated increment in phloem transport capacity relates to fruit yield in tomato
Plant Biotechnology Journal ( IF 10.1 ) Pub Date : 2022-04-28 , DOI: 10.1111/pbi.13831 Hoyoung Nam 1 , Aarti Gupta 1 , Heejae Nam 1 , Seungchul Lee 1 , Hyun Seob Cho 1 , Chanyoung Park 1 , Soyoung Park 1 , Soon Ju Park 2 , Ildoo Hwang 1
Plant Biotechnology Journal ( IF 10.1 ) Pub Date : 2022-04-28 , DOI: 10.1111/pbi.13831 Hoyoung Nam 1 , Aarti Gupta 1 , Heejae Nam 1 , Seungchul Lee 1 , Hyun Seob Cho 1 , Chanyoung Park 1 , Soyoung Park 1 , Soon Ju Park 2 , Ildoo Hwang 1
Affiliation
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The continuous growth of the global population and the increase in the amount of arid land has severely constrained agricultural crop production. To solve this problem, many researchers have attempted to increase productivity through the efficient distribution of energy; however, the direct relationship between the plant vasculature, specifically phloem development, and crop yield is not well established. Here, we demonstrate that an optimum increase in phloem-transportation capacity by reducing SIJUL expression leads to improved sink strength in tomato (Solanum lycopersicum L.). SIJUL, a negative regulator of phloem development, suppresses the translation of a positive regulator of phloem development, SlSMXL5. The suppression of SlJUL increases the number of phloem cells and sucrose transport, but only an optimal reduction of SlJUL function greatly enhances sink strength in tomato, improving fruit setting, and yield contents by 37% and 60%, respectively. We show that the increment in phloem cell number confers spare transport capacity. Our results suggest that the control of phloem-transport capacity within the threshold could enhance the commitment of photosynthates to instigate yield improvement.
中文翻译：
JULGI 介导的韧皮部运输能力增加与番茄果实产量有关
全球人口的持续增长和干旱土地面积的增加严重制约了农作物的生产。为了解决这个问题，许多研究人员试图通过能源的有效分配来提高生产力。然而，植物脉管系统，特别是韧皮部发育与作物产量之间的直接关系尚不明确。在这里，我们证明了通过减少SIJUL表达来优化韧皮部运输能力可以提高番茄 ( Solanum lycopersicum L.) 的库强度。SIJUL 是韧皮部发育的负调节剂，抑制韧皮部发育的正调节剂SlSMXL5的翻译。SlJUL的抑制增加了韧皮部细胞的数量和蔗糖运输，但只有最佳降低 SlJUL 功能才能大大提高番茄的库强度，提高坐果率，产量分别提高 37% 和 60%。我们表明韧皮部细胞数量的增加赋予了备用运输能力。我们的研究结果表明，将韧皮部转运能力控制在阈值内可以增强光合产物对促进产量提高的承诺。
更新日期：2022-04-28
中文翻译：
JULGI 介导的韧皮部运输能力增加与番茄果实产量有关
全球人口的持续增长和干旱土地面积的增加严重制约了农作物的生产。为了解决这个问题，许多研究人员试图通过能源的有效分配来提高生产力。然而，植物脉管系统，特别是韧皮部发育与作物产量之间的直接关系尚不明确。在这里，我们证明了通过减少SIJUL表达来优化韧皮部运输能力可以提高番茄 ( Solanum lycopersicum L.) 的库强度。SIJUL 是韧皮部发育的负调节剂，抑制韧皮部发育的正调节剂SlSMXL5的翻译。SlJUL的抑制增加了韧皮部细胞的数量和蔗糖运输，但只有最佳降低 SlJUL 功能才能大大提高番茄的库强度，提高坐果率，产量分别提高 37% 和 60%。我们表明韧皮部细胞数量的增加赋予了备用运输能力。我们的研究结果表明，将韧皮部转运能力控制在阈值内可以增强光合产物对促进产量提高的承诺。
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