ISSN:0044-5983    

DOI:10.1111/j.1438-8677.1994.tb00749.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:0044-5983    

DOI:10.1111/j.1438-8677.1994.tb00750.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SUMMARYThe germination ecology of the short‐lived grassland biennialLinum catharticumL. was studied. Its seeds had a primary dormancy that was overcome by cold‐treatment. Seeds buried in the soil became germinative in midwinter (December), but since the seeds germinate only at relatively high temperatures, autumn‐sown seeds did not germinate in the field until late spring, at which time the average soil temperature was 20°C. During the first half of the summer, buried seeds re‐entered dormancy, but by August this secondary dormancy had already been broken. In the following summer some of the seeds became dormant again. Hence, buriedL. catharticumseeds exhibited an annual dormancy cycle. Most exhumed seeds needed light to germinate, which is probably whyL. catharticumaccumulates a persistent soil seed bank. After 25 months, 96% of the seeds buried were still ungerminated a

ISSN:0044-5983    

DOI:10.1111/j.1438-8677.1994.tb00751.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

SUMMARYVery young Scots pine needles were found to have a higher percentage of their peristomal rim surface area covered with amorphous wax than needles sampled 5 weeks later. This, in combination with the observation of wax crystalloids (rodlets) on top of amorphous wax crusts, is interpreted as evidence for wax recrystallization.

ISSN:0044-5983    

DOI:10.1111/j.1438-8677.1994.tb00752.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:0044-5983    

DOI:10.1111/j.1438-8677.1994.tb00753.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Book reviewed in this article:African Fig Trees and Fig WaspsC.C. Berg and J.T. WiebesUtrecht University Catalogue of Plant CollectionsB.J.W. van den Wollenberg, J. Tolsma, J. Vos, V.P.A. Lukkien and A. Oudijk (eds)Ecology of Cenchrus Grass Complex (Serle T:VS 23)S.C. Pandeya and H. LiethBreeding for Stress Tolerance in Cool‐season Food LegumesK.B. Singh and M.C. Saxena (eds)Legumes: The Australian ExperienceB.R. Davidson and H.F. DavidsonThe Tapetum: Cytology, Function, Biochemistry and Evolution (Plant Systematics and Evolution, Supplementum 7)H. Hess, E. Pacini and M. Willemse (eds)The Families of Flowering PlantsL. Watson and M. Dallwi

ISSN:0044-5983    

DOI:10.1111/j.1438-8677.1994.tb00754.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:0044-5983    

DOI:10.1111/j.1438-8677.1994.tb00755.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY