摘要:

The chestnut woods on the hills South-West of Siena: their past origin and present modifications.—Phytosociological methods have been used to ascertain the origin and recent hystory of chestnut groves in the South-western Siennese hills. The present analysis was based on the assumption that chestnut (Castanea sativa) is autochthonous in this area, frequently occurring in mixed oakwoods of the orderQuercetalia robori-petraeaeand particularly abundant in the cooler and less dry sites.

ISSN:0017-0070    

DOI:10.1080/11263507909426629

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

The littoral flora of Pescara as a biological indicator of the environmental status and its modifications.—The flora of the Pescara littoral, and the vegetation, limited now to restricted areas in the outskirts, mainly near the mouth of the Saline river, and to the dunes, have been studied.

ISSN:0017-0070    

DOI:10.1080/11263507909426630

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

On the presence of Hierochloë odorata (L.) Beauv. in Italy.—H. odoratahas been found in an oligotrophic marsh in the Italian part of the Eastern Alps and therefore definitively confirmed for the flora of Italy. An extended population occurs at 1800 m above sea level near Misurina, in the Dolomites (province of Belluno). All preceding records ofH. odoratafor the Italian flora must be referred toH. australis(Schrader) R.&S. Differential characters and distribution of the two species are shortly discussed.

ISSN:0017-0070    

DOI:10.1080/11263507909426631

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Internodal segments ofOlea europaeaL., cv. Frantoio, were cultivatedin vitroon a solid nutrient medium, under controlled conditions. Trials were carried out with different culture media, related also to the optimal sucrose ratios, in order to find the most suitable experimental conditions for callogenesis and rhizogenesis in this cultivar. Positive indications about the influence of the growth substances added, both on callus and root formation, were obtained, also in respect to the influence of the collection period and of explant polarity.

ISSN:0017-0070    

DOI:10.1080/11263507909426632

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Observations on sections ofFunaria hygrometricaspores confirm that dry spores store only lipids, mostly located in a central drop; the nucleus surrounded by cell organelles is in a peripheral position; a space is observed between the spore wall and cytoplasm. In light conditions, the distension phase is reached between 16 to 20 hrs and rhizoid develops very quickly (growth phase) between 24 to 48 hrs, whereas the protonema remains as a protuberance. After a week in the dark, only swelling phase is completed. After 4 hrs of hydration, a considerable amount of starch in chloroplasts, exine cracking, diameter increase and greening of chloroplasts is observed both in dark and light conditions.

ISSN:0017-0070    

DOI:10.1080/11263507909426633

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Development of the seed integument of Cercis siliquastrum L., with particular attention to the appearance and structure of the light line.—A research on the growth of the seed integument ofCercis siliquastrumL. has been carried out with the optical and. polarizing microscope and with the scanning electron microscope. The first appearance of the light line in the palisade layer, in relation to the development stage of the seed, has been ascertained. The structural nature of the light line is discussed.

ISSN:0017-0070    

DOI:10.1080/11263507909426634

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

The phytotoxic action of Irpexil (methyl acethydroxamoil-acetate) on higher plants. Note II. Modification of free aminoacids, soluble carbohydrates and some essential ash components levels in Triticum vulgare seedlings.—The fungal metabolite Irpexil (methyl acethydroxamoilacetate) at moderate concentrations (2–3.10−4M) increase both free aminoacids and soluble carbohydrates levels in wheat seedlings grown in White's solution. Particularly, asparagine, cystine, glycine and oligosaccharides are increased in the whole plant, sucrose increases more significantly in the roots. The quantities of some essential ash components as P, K, Mg, Mn, Ca and Fe are also significantly affected.

ISSN:0017-0070    

DOI:10.1080/11263507909426635

出版商:Taylor & Francis Group    

年代:1979

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:10.1080/11263507909426628

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor