A Functional Analysis of Inflorescence Architecture in Musa L. (Musaceae)

IF 4 2区 农林科学 Q2 FOOD SCIENCE & TECHNOLOGY
David W. Turner, D. Jane Gibbs, Walter Ocimati, Guy Blomme
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引用次数: 0

Abstract

Inflorescence architecture underpins sexual reproduction in wild Musa species and productivity in edible banana cultivars. In a functional analysis, we identified the apical inflorescence and lateral ‘cushion’ meristems and the change in flower type as the three primary components that generate inflorescence architecture. Five genotypes of two clone sets of edible plantains (Musa AAB) were grown for four generations along an elevation gradient (1100–2200 m, 16°C–24°C) straddling the equator in the humid highlands of East Africa. The data consisted of reproductive peduncle length at harvest (Pr), fruit per hand (Fh) and hands per bunch (Hb). The activity of the apical inflorescence meristem drives peduncle length and generates lateral ‘cushion’ meristems which determine Fh. However, Hb is determined by a change in flower type—from fruit forming to non-fruit forming. Site temperature affected Hb more than Fh, while the development of the genet (rhizome) changed the allocation of resources between Hb and Fh, independently of the effect of site temperature. Clone sets differed in their response to genet development. Cooler temperatures reduced the number of fruit-forming flowers in an inflorescence and changed the balance away from female towards male flowers. In banana breeding schemes, manipulating inflorescence components independently raises options for producing genotypes better suited to markets, environments and cultural practices.

Abstract Image

麝香草花序结构的功能分析
花序结构是野生穆萨物种有性生殖和食用香蕉栽培品种产量的基础。通过功能分析,我们确定顶端花序和侧 "垫 "分生组织以及花型的变化是产生花序结构的三个主要组成部分。在东非潮湿高原,我们沿着横跨赤道的海拔梯度(1100-2200 米,16°C-24°C)种植了食用芭蕉(Musa AAB)两个克隆集的五个基因型,共进行了四代。数据包括收获时的生殖梗长度(Pr)、每手果实数(Fh)和每串果实数(Hb)。顶端花序分生组织的活动推动了花序梗的长度,并产生了决定 Fh 的侧 "垫 "分生组织。然而,Hb 是由花朵类型的变化决定的--从形成果实到不形成果实。地点温度对 Hb 的影响大于对 Fh 的影响,而基因组(根茎)的发育改变了 Hb 和 Fh 之间的资源分配,与地点温度的影响无关。克隆集对基因组发育的反应各不相同。较低的温度减少了花序中形成果实的花朵数量,并改变了雌花与雄花之间的平衡。在香蕉育种计划中,对花序各组成部分进行独立操作,可以培育出更适合市场、环境和文化习俗的基因型。
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来源期刊
Food and Energy Security
Food and Energy Security Energy-Renewable Energy, Sustainability and the Environment
CiteScore
9.30
自引率
4.00%
发文量
76
审稿时长
19 weeks
期刊介绍: Food and Energy Security seeks to publish high quality and high impact original research on agricultural crop and forest productivity to improve food and energy security. It actively seeks submissions from emerging countries with expanding agricultural research communities. Papers from China, other parts of Asia, India and South America are particularly welcome. The Editorial Board, headed by Editor-in-Chief Professor Martin Parry, is determined to make FES the leading publication in its sector and will be aiming for a top-ranking impact factor. Primary research articles should report hypothesis driven investigations that provide new insights into mechanisms and processes that determine productivity and properties for exploitation. Review articles are welcome but they must be critical in approach and provide particularly novel and far reaching insights. Food and Energy Security offers authors a forum for the discussion of the most important advances in this field and promotes an integrative approach of scientific disciplines. Papers must contribute substantially to the advancement of knowledge. Examples of areas covered in Food and Energy Security include: • Agronomy • Biotechnological Approaches • Breeding & Genetics • Climate Change • Quality and Composition • Food Crops and Bioenergy Feedstocks • Developmental, Physiology and Biochemistry • Functional Genomics • Molecular Biology • Pest and Disease Management • Post Harvest Biology • Soil Science • Systems Biology
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