Monopodial and sympodial branching architecture in cotton is differentially regulated by the Gossypium hirsutum SINGLE FLOWER TRUSS and SELF-PRUNING orthologs
Monopodial and sympodial branching architecture in cotton is differentially regulated by the Gossypium hirsutum SINGLE FLOWER TRUSS and SELF-PRUNING orthologs
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DOI：
10.1111/nph.14037
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发表时间：
2016-10-01
期刊：
影响因子：
9.4
通讯作者：
Ayre, Brian G.
中科院分区：
文献类型：
--
作者：
McGarry, Roisin C.;Prewitt, Sarah F.;Ayre, Brian G.
高地棉（Gossypium hirsutum）的驯化使其从一种瘦长的光周期性多年生植物转变为一种昼中性的年行作物。然而，残留的多年生性状使灌溉和作物管理复杂化，并且需要更确定的结构。棉花同时保持健壮的单轴不定芽和合轴有限芽。我们质疑是否以及如何FLOWERLOCUS T/单花桁架（SFT）样和植物花1/自修剪（SP）样基因控制的单轴和合轴生长的平衡，在木本多年生植物复杂的生长习性。基于病毒的操纵GhSP和GhSFT表达使前所未有的棉花发育功能分析成为可能。GhSP维持所有顶端的生长;在其缺失的情况下，单轴和合轴分支系统都过早终止。GhSFT编码一个成花信号，刺激快速发病的合轴分枝和开花的侧枝野生光周期和现代天中性加入。高成花素浓度没有改变单轴顶端，这意味着一旦棉花顶端是SP决定的，它不能被成花素重置。GhSP也是建立和维持形成层活动必不可少的。GhSFT和GhSP水平的动态变化在单株植物中引导单轴和合轴程序之间的分生组织。SFT和SP影响棉花驯化，是进一步农业优化的理想目标。
Domestication of upland cotton (Gossypium hirsutum) converted it from a lanky photoperiodic perennial to a day-neutral annual row-crop. Residual perennial traits, however, complicate irrigation and crop management, and more determinate architectures are desired. Cotton simultaneously maintains robust monopodial indeterminate shoots and sympodial determinate shoots. We questioned if and how the FLOWERING LOCUS T/SINGLE FLOWER TRUSS (SFT)-like and TERMINAL FLOWER1/SELF-PRUNING (SP)-like genes control the balance of monopodial and sympodial growth in a woody perennial with complex growth habit. Virus-based manipulation of GhSP and GhSFT expression enabled unprecedented functional analysis of cotton development.GhSP maintains growth in all apices; in its absence, both monopodial and sympodial branch systems terminate precociously. GhSFT encodes a florigenic signal stimulating rapid onset of sympodial branching and flowering in side shoots of wild photoperiodic and modern day-neutral accessions. High florigen concentrations did not alter monopodial apices, implying that once a cotton apex is SP-determined, it cannot be reset by florigen. GhSP is also essential to establish and maintain cambial activity. Dynamic changes in GhSFT and GhSP levels navigate meristems between monopodial and sympodial programs in a single plant. SFT and SP influenced cotton domestication and are ideal targets for further agricultural optimization.