Arid
DOI10.1071/BT14124
Comparative developmental anatomy of the taproot of the cucurbitaceous vines Citrullus colocynthis (perennial), Citrullus lanatus (annual) and Cucumis myriocarpus (annual)
Burrows, Geoffrey E.1,2; Shaik, Razia S.1,2
通讯作者Burrows, Geoffrey E.
来源期刊AUSTRALIAN JOURNAL OF BOTANY
ISSN0067-1924
EISSN1444-9862
出版年2014
卷号62期号:7页码:537-545
英文摘要

The genus Citrullus (Cucurbitaceae) consists of four species of desert vines. Two species (Citrullus colocynthis and Citrullus lanatus) are widespread weeds on several continents. Above ground, they can be relatively difficult to distinguish apart. However, Citrullus colocynthis is a perennial with a tuberous taproot, whereas Citrullus lanatus is an annual with a slender taproot. We studied the morphology and anatomy of taproot development to better understand their structural and ecological differences. The annual Citrullus lanatus reached close to its maximum taproot diameter (similar to 3mm) soon after germination. The vascular cambium formed four relatively broad triangular sectors of fibres in which were embedded relatively large diameter vessels. These sectors were separated by narrower triangular areas of secondary ray parenchyma. In contrast, the taproot diameter of the perennial Citrullus colocynthis continued to increase during the study, reaching similar to 20mm after 14 weeks. Most of this substantial root consisted of secondary xylem parenchyma, with a low density of relatively small diameter vessels and few fibres. The remarkable differences in root morphology and anatomy of the studied species of Citrullus are related to differences in their annual and perennial lifecycles. Interestingly, the slender taproots of Citrullus lanatus were calculated to have a similar theoretical hydraulic conductance to that of Citrullus colocynthis (large diameter taproot).


英文关键词camel melon colocynth cucurbit Cucurbitaceae morphology periderm phellem paddy melon root anatomy tuberous root vessel
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000349994100001
WOS关键词GROWTH FORMS ; EVOLUTION ; SCHRAD ; LIANAS ; STEM
WOS类目Plant Sciences
WOS研究方向Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/181004
作者单位1.NSW Dept Primary Ind, Graham Ctr Agr Innovat, Wagga Wagga, NSW 2678, Australia;
2.Charles Sturt Univ, Sch Agr & Wine Sci, Wagga Wagga, NSW 2678, Australia
推荐引用方式
GB/T 7714
Burrows, Geoffrey E.,Shaik, Razia S.. Comparative developmental anatomy of the taproot of the cucurbitaceous vines Citrullus colocynthis (perennial), Citrullus lanatus (annual) and Cucumis myriocarpus (annual)[J],2014,62(7):537-545.
APA Burrows, Geoffrey E.,&Shaik, Razia S..(2014).Comparative developmental anatomy of the taproot of the cucurbitaceous vines Citrullus colocynthis (perennial), Citrullus lanatus (annual) and Cucumis myriocarpus (annual).AUSTRALIAN JOURNAL OF BOTANY,62(7),537-545.
MLA Burrows, Geoffrey E.,et al."Comparative developmental anatomy of the taproot of the cucurbitaceous vines Citrullus colocynthis (perennial), Citrullus lanatus (annual) and Cucumis myriocarpus (annual)".AUSTRALIAN JOURNAL OF BOTANY 62.7(2014):537-545.
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