摘要:

Using light and electron microscopy, we have studied the microsporogenesis and tapetal development of the feathers in two different low producing clones of Picolit giallo (sp.Vitis vinifera). In these clones while the productivity of the main branches (fertile branches originated from buds, formed in the previous year, that remained silent during the winter) is very low, that of the feathers (fertile branches derived from annual buds) is always normal.

ISSN:0017-0070    

DOI:10.1080/11263508309427962

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor

摘要:

Nucellar embryogenesis in undeveloped ovules in some navel orange cultivars. - Nucellar embryogenesis has been studied in some cultivars of navel orange,Citrus sinensis(L.) Osbeck. Histological observations have been carried out in undeveloped ovules excised 2, 4, 6, 8 months after anthesis. Ovules under study derived a) from flowers naturally pollinated or hand-pollinated with pollen ofPoncirus trifoliata(L.) Raf.; b) from emasculated flowers, and c) from flowers deprived of stigma. In absence of pollination, as well as in absence of fertilization, the nucellar embryos reached the globular stage.

ISSN:0017-0070    

DOI:10.1080/11263508309427963

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor

摘要:

The authors describe the occurrence ofGonyaulax tamarensisLebour bloom in the Adriatic Sea between 200 and 1000 m off the coast of Emilia-Romagna during the period of August 14-20 1982.

ISSN:0017-0070    

DOI:10.1080/11263508309427964

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor

摘要:

Results suggest that the toxicity of mercury and copper to two unicellular algae (Cyanidium caldariumandChlorella saccharophila) can be decreased either through their subtraction from the culture medium by living or dead cells, or by the extracellular products.

ISSN:0017-0070    

DOI:10.1080/11263508309427965

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor

摘要:

A rare polypore: Trametes ljubarskyi Pilàt, new to Italy. VII. - The presence ofTrametes ljubarskyiPil. (Polyporaceae) is reported for the first time in Italy.

ISSN:0017-0070    

DOI:10.1080/11263508309427966

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor

ISSN:0017-0070    

DOI:10.1080/11263508309427967

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue

ISSN:0017-0070    

DOI:10.1080/11263508309427961

出版商:Taylor & Francis Group    

年代:1983

数据来源: Taylor