Arid
DOI10.1093/aob/mcu252
Developing sporophytes transition from an inducible to a constitutive ecological strategy of desiccation tolerance in the moss Aloina ambigua: effects of desiccation on fitness
Stark, Lloyd R.1; Brinda, John C.2
通讯作者Stark, Lloyd R.
来源期刊ANNALS OF BOTANY
ISSN0305-7364
EISSN1095-8290
出版年2015
卷号115期号:4页码:593-603
英文摘要

Background and Aims Two ecological strategies of desiccation tolerance exist in plants, constitutive and inducible. Because of difficulties in culturing sporophytes, very little is known about desiccation tolerance in this generation and how desiccation affects sexual fitness.


Methods Cultured sporophytes and vegetative shoots from a single genotype of the moss Aloina ambigua raised in the laboratory were tested for their strategy of desiccation tolerance by desiccating the shoot-sporophyte complex and vegetative shoots at different intensities, and comparing outcomes with those of undried shoot-sporophyte complexes and vegetative shoots. By using a dehardened clonal line, the effects of field, age and genetic variance among plants were removed.


Key Results The gametophyte and embryonic sporophyte were found to employ a predominantly inducible strategy of desiccation tolerance, while the post-embryonic sporophyte was found to employ a moderately constitutive strategy of desiccation tolerance. Further, desiccation reduced sporophyte fitness, as measured by sporophyte mass, seta length and capsule size. However, the effects of desiccation on sporophyte fitness were reduced if the stress occurred during embryonic development as opposed to postembryonic desiccation.


Conclusions The effects of desiccation on dehardened sporophytes of a bryophyte are shown for the first time. The transition from one desiccation tolerance strategy to the other in a single structure or generation is shown for only the second time in plants and for the first time in bryophytes. Finding degrees of inducible strategies of desiccation tolerance in different life phases prompts the formulation of a continuum hypothesis of ecological desiccation tolerance in mosses, where desiccation tolerance is not an either/or phenomenon, but varies in degree along a gradient of ecological inducibility.


英文关键词Bryophyte moss Aloina ambigua Pottiaceae rate of desiccation chlorosis phenology inducible desiccation tolerance constitutive desiccation tolerance sporophyte embryo sporophyte fitness dehardening seta elongation
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000354066600004
WOS关键词DESERT MOSS ; FUNARIA-HYGROMETRICA ; ABSCISIC-ACID ; PHYSCOMITRELLA-PATENS ; POLYTRICHUM-FORMOSUM ; REPRODUCTIVE INVESTMENT ; CROSSIDIUM-CRASSINERVE ; PHYSIOLOGICAL-ASPECTS ; GAMETOPHYTE JUNCTION ; SEXUAL REPRODUCTION
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/2XILL650/185748
作者单位1.Univ Nevada, Sch Life Sci, Las Vegas, NV 89154 USA;
2.Missouri Bot Garden, St Louis, MO 63166 USA
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GB/T 7714
Stark, Lloyd R.,Brinda, John C.. Developing sporophytes transition from an inducible to a constitutive ecological strategy of desiccation tolerance in the moss Aloina ambigua: effects of desiccation on fitness[J],2015,115(4):593-603.
APA Stark, Lloyd R.,&Brinda, John C..(2015).Developing sporophytes transition from an inducible to a constitutive ecological strategy of desiccation tolerance in the moss Aloina ambigua: effects of desiccation on fitness.ANNALS OF BOTANY,115(4),593-603.
MLA Stark, Lloyd R.,et al."Developing sporophytes transition from an inducible to a constitutive ecological strategy of desiccation tolerance in the moss Aloina ambigua: effects of desiccation on fitness".ANNALS OF BOTANY 115.4(2015):593-603.
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