Arid
DOI10.1016/S0929-1393(97)00013-9
Mycorrhizal dependency of a representative plant species in Mediterranean shrublands (Lavandula spica L.) as a key factor to its use for revegetation strategies in desertification-threatened areas
Azcon, R; Barea, JM
通讯作者Barea, JM
来源期刊APPLIED SOIL ECOLOGY
ISSN0929-1393
出版年1997
卷号7期号:1页码:83-92
英文摘要

Lavender plants (Lavandula spp.) are small woody shrubs which belong to the natural succession in certain plant communities of semiarid mediterranean ecosystems in the southeast of Spain and they thrive in areas which are threatened by desertification. Lavender plants form arbuscular mycorrhizas and have been described as mycorrhizal-dependent species, but they are also known to display a stimulated root phosphatase activity in conditions of low-nutrient supply. Consequently, a series of microcosm experiments were carried out in order to identify the relative importance of the mycotrophic habit in comparison with phosphatase production as mechanisms which account for plant establishment and nutrient uptake, using four soils typical of the degraded area of study. It was found that lavender plants were obligatorily mycorrhizal species under the prevailing conditions of their natural habitat. The specific activity of root-associated acid phosphatase in lavender was enhanced in P-deficient, non-mycorrhizal, plants, but apparently this stimulated phosphatase activity did not result in an increased ability of the plant to take up P. Low organic phosphate content in the test soils may account for the absence of plant response to acid phosphatase activity. However, it is much more likely that this ineffectiveness is due to the fact that P-deficiency is concomitant, in the degraded test habitats, with deficiencies in other nutrients. Thus plant growth is being limited by an overall lack of nutrient supply. Mycorrhizal inoculation largely improved P, N and K uptake thereby restoring the biochemical cycling of plant nutrients. In conclusion, lavender plants must be mycorrhizal in order to thrive in the degraded soils from desertification threatened areas in typical mediaterranean ecosystems. (C) 1997 Elsevier Science B.V.


英文关键词arbuscular mycorrhizas Lavandula spp. acid phosphatase desertification revegetation
类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000071231900008
WOS关键词VESICULAR-ARBUSCULAR MYCORRHIZAE ; PHOSPHATASE-ACTIVITY ; FUNGI ; PHOSPHORUS ; SOIL ; ACQUISITION ; RHIZOSPHERE ; INFECTION ; ECOSYSTEMS ; CULTIVARS
WOS类目Soil Science
WOS研究方向Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/133803
作者单位(1)CSIC, Estac Expt Zaidin, Dept Microbiol Suelo & Sistemas Simbiot, E-18008 Granada, Spain
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Azcon, R,Barea, JM. Mycorrhizal dependency of a representative plant species in Mediterranean shrublands (Lavandula spica L.) as a key factor to its use for revegetation strategies in desertification-threatened areas[J],1997,7(1):83-92.
APA Azcon, R,&Barea, JM.(1997).Mycorrhizal dependency of a representative plant species in Mediterranean shrublands (Lavandula spica L.) as a key factor to its use for revegetation strategies in desertification-threatened areas.APPLIED SOIL ECOLOGY,7(1),83-92.
MLA Azcon, R,et al."Mycorrhizal dependency of a representative plant species in Mediterranean shrublands (Lavandula spica L.) as a key factor to its use for revegetation strategies in desertification-threatened areas".APPLIED SOIL ECOLOGY 7.1(1997):83-92.
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