Arid
DOI10.17660/ActaHortic.2018.1204.23
Fungi associated with Aizoaceae seed in the Succulent Karoo
Pieterse, Z.1; Aveling, T. A. S.1; Jacobs, A.2
通讯作者Pieterse, Z.
会议名称7th International Symposium on Seed, Transplant and Stand Establishment of Horticultural Crops (SEST)
会议日期SEP 11-15, 2016
会议地点Pretoria, SOUTH AFRICA
英文摘要

The Aizoaceae, commonly known as mesembs or "ice plants", is a plant family endemic to Namaqualand, an area inside the Succulent Karoo biodiversity hotspot in South Africa. The more than 1800 unique mesembs are in part characterised by their hygrochastic seed capsules dispersing their seed by jet action. Six capsule types: Mesembryanthemum-, Delosperma-, Drosanthemum-, Lampranthus-, Ruschia- and Leipoldtia-type are distinguished by differences in funicles, covering membranes and closing bodies. With the existence of microbial endemism, now widely recognised, research into community ecology in the Succulent Karoo is needed to enable proper conservation. Sadly the microbial life associated with Aizoaceae has received little attention, Alternaria, Colletotrichum and Fusarium, have however been isolated from the halophyte Sesuvium portulacastrum, one of the few species from Aizoaceae but not endemic to South Africa. Fungi are known to aid in germination, seedling establishment, growth, water relations and nutrition in the Cactaceae (a family closely related to Aizoaceae). We believe that fungi may play a role in the ability of Aizoaceae to thrive in Namaqualand due to their specialization in the form of thick-walled spores that remain viable and have the ability to grow slow even at extreme aridity. We have isolated species of Alternaria, Aspergillus, Bipolaris, Cladosporium, Fusarium and Talaromyces from seeds of common mesemb species from Namaqualand. This is the first report of fungi associating with the specialised propagative material of Aizoaceae.


英文关键词arid biodiversity capsule hotspot hygrochastic mesembs seed-borne
来源出版物VII INTERNATIONAL SYMPOSIUM ON SEED, TRANSPLANT AND STAND ESTABLISHMENT OF HORTICULTURAL CROPS - SEST2016
ISSN0567-7572
EISSN2406-6168
出版年2018
卷号1204
页码177-185
EISBN978-94-62612-02-0
出版者INT SOC HORTICULTURAL SCIENCE
类型Proceedings Paper
语种英语
国家South Africa
收录类别CPCI-S
WOS记录号WOS:000465808400023
WOS关键词FOURWING SALTBUSH ; ENDOPHYTIC FUNGI ; CLASSIFICATION ; PERFORMANCE ; VEGETATION ; PLANTS
WOS类目Horticulture
WOS研究方向Agriculture
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/307708
作者单位1.Univ Pretoria, Dept Plant & Soil Sci, Forestry & Agr Biotechnol Inst, Pretoria, South Africa;
2.Agr Res Council, Plant Protect Res Inst Biosystemat, Pretoria, South Africa
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Pieterse, Z.,Aveling, T. A. S.,Jacobs, A.. Fungi associated with Aizoaceae seed in the Succulent Karoo[C]:INT SOC HORTICULTURAL SCIENCE,2018:177-185.
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