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Effects of desiccation of seeds in nine species with morphophysiological dormancy on germination and embryo growth

Journal of Plant Ecology 2021年第1期14卷 132-146页

作者： Miguel A.copete Jose M.Herranz Raquel Herranz elena copete Pablo Ferrandis ETSIAM Department of Plant Production and Agricultural TechnologyUniversity of Castilla-La ManchaUniversity Campus s/nAlbacete 02071Spain Botanical Institute University of Castilla-La ManchaAvenida de la Mancha s/nAlbacete 02006Spain

Aims In species with morphophysiological seed dormancy(MPD),little is known about the effects of desiccation of imbibed seeds on embryo growth and *** studied seed responses to dehydration in nine species with different levels of *** For each species,a control test was conducted by keeping seeds permanently hydrated and exposed to the optimal stratification-incubation sequenee to promote embryo ***,tests were run in which seed stratification was interrupted for 1 month by desiccation at room *** Findings In Clematis vitalba and Ribes alpinum,with non deep simple MPD,desiccation affected neither embryo growth nor seed viability,but the desiccation led to a decrease of germinative ability in *** by 16%.The seeds of Narcissus pseudonarcissus ***-garmendiae,with deep simple epicotyl MPD,tolerated desiccation in different embryo growth stages,but their germinative ability decreased *** response of species with complex levels of MPD to desiccation was more variable:Delphinium fissum ***,with intermediate complex MPD,and Anthriscus sylvestris and Meum athamanticum,both with deep complex MPD,tolerated *** contrast,Ribes uva-crispa with nondeep complex MPD,Lonicera pyrenaica with intermediate complex MPD and Chaerophyllum aureum with deep complex MPD,had diminished germination ability by *** seeds of the species with simple levels of MPD tolerated desiccation,those of some species with complex levels were also highly ***,desiccation did not induce secondary dormancy in late embryo growth *** desiccation tolerance of imbibed seeds of most of the nine species may show their adaptability to climate change in the Mediterranean region.

关键词： complex morphophysiological dormancy germinative ability simple morphophysiological dormancy secondary dormancy viability

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