Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1093/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
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ISSN | 0305-7364 |
EISSN | 1095-8290 |
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 |
推荐引用方式 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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