The transition from vegetative growth to flowering is associated with suppression of the MUSA CENTRORADIALIS (MCN ) gene family in day neutral banana

IF 4.2 2区生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY

Plant Science Pub Date : 2024-10-15 DOI:10.1016/j.plantsci.2024.112289

Akhilesh K. Chaurasia , Hemant B. Patil , Bal Krishna , Vadakanthara R. Subramaniam , Prafullachandra V. Sane , Aniruddha P. Sane

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引用次数: 0

Abstract

Control over flowering time is essential for reproductive success and survival of plants. The TERMINAL FLOWER1/CENTRORADIALIS/BROTHER OF FT AND TFL1 (TFL1/CEN/BFT) genes are key suppressor of flowering time that prevents premature conversion of the apical meristem into a floral meristem thereby allowing indeterminate vegetative growth. We have identified and characterized seven members of banana TFL1/CEN/BFT gene family (MCN1–7). All genes except MCN6 show overlapping expression in the shoot apical meristem as well as leaves from the initial to mid-vegetative phases. Their expression is collectively reduced to their lowest just prior to flowering initiation at around 171 days, 226 days and 297 days, respectively, in three differently flowering varieties. Thereafter, there is steady increase in their transcript levels in the apical meristem as well as leaves that correlates with the development and growth of the inflorescence. The ability of three of the genes, MCNs1–3, to functionally complement the tfl1–14 mutant of Arabidopsis provides additional evidence for structural and functional similarities of the MCN proteins to TFL1 even in a distantly related plant. Together, these results suggest that the MCN family in banana is associated with vegetative growth and suppression of flowering time initiation as well as indeterminate growth of inflorescence.

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香蕉从无性繁殖到开花的转变与日中性香蕉的 MUSA CENTRORADIALIS（MCN）基因家族的抑制有关。

控制开花时间对植物的繁殖成功和生存至关重要。TERMINAL FLOWER1/CENTRORADIALIS/BROTHER OF FT 和 TFL1（TFL1/CEN/BFT）基因是花期的关键抑制因子，可防止顶端分生组织过早转化为花分生组织，从而使无性繁殖成为可能。我们鉴定并描述了香蕉 TFL1/CEN/BFT 基因家族（MCN1-7）的七个成员。除 MCN6 外，所有基因在植株初期到中期的芽顶端分生组织和叶片中都有重叠表达。在三个不同花期的品种中，它们的表达量在开花前分别在 171 天、226 天和 297 天左右集体降到最低。此后，它们在顶端分生组织和叶片中的转录水平稳步上升，这与花序的发育和生长有关。其中三个基因 MCNs1-3 能够对拟南芥的 tfl1-14 突变体进行功能互补，这进一步证明了 MCN 蛋白与 TFL1 在结构和功能上的相似性，即使在远缘植物中也是如此。这些结果表明，香蕉中的 MCN 家族与无性生长、抑制花期的开始以及花序的不定期生长有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plant Science 生物-生化与分子生物学

CiteScore

9.10

自引率

1.90%

发文量

322

审稿时长

33 days

期刊介绍： Plant Science will publish in the minimum of time, research manuscripts as well as commissioned reviews and commentaries recommended by its referees in all areas of experimental plant biology with emphasis in the broad areas of genomics, proteomics, biochemistry (including enzymology), physiology, cell biology, development, genetics, functional plant breeding, systems biology and the interaction of plants with the environment. Manuscripts for full consideration should be written concisely and essentially as a final report. The main criterion for publication is that the manuscript must contain original and significant insights that lead to a better understanding of fundamental plant biology. Papers centering on plant cell culture should be of interest to a wide audience and methods employed result in a substantial improvement over existing established techniques and approaches. Methods papers are welcome only when the technique(s) described is novel or provides a major advancement of established protocols.