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1. |
Carotenoids in ripe green and in autumn senescing leaves of apple tree: I - Qualitative composition of free carotenoids, xanthophyll esters and fatty acids of esters |
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Giornale botanico italiano,
Volume 116,
Issue 3-4,
1982,
Page 97-115
Franco Cardini,
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摘要:
By different chemical, spectral and chromatographic procedures seven carotenoids, two carotenes (α- and β-carotene) and five free xanthophylls (violaxanthin, lutein, antheraxanthin, zeaxanthin and neoxanthin) have been isolated and identified in green apple leaves. In autumn senescing leaves, besides the above seven carotenoids, the occurrence of at least seven xanthophyll esters has also been proved. Four esters, violaxanthin mono- and diester and lutein mono- and diester, (≥90% of total esters) and a minor component, neoxanthin triester, have been identified. Another minor component is most probably a monoester of antheraxanthin; the seventh, present in traces, has not been identified.
ISSN:0017-0070
DOI:10.1080/11263508209428055
出版商:Taylor & Francis Group
年代:1982
数据来源: Taylor
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2. |
Rhodymenia delicatula P.J.L. Dangeard (Rhodophyta, Rhodymeniales) en Méditerranée |
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Giornale botanico italiano,
Volume 116,
Issue 3-4,
1982,
Page 117-121
Flora de Masi,
GaetanoM. Gargiulo,
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摘要:
Presence of Rhodymenia delicatula P.J.L. Dangeard in the Mediterranean. - The presence ofRhodymenia delicatulaP.J.L. Dangeard (Rhodophyta, Rhodymeniales) in the southern Thyrrhenian sea is reported. Both cystocarpic and tetrasporic individuals have been collected. Anatomical features of the reproductive structures, as well as the position of these on the thallus allowed the identification of this species formerly known for the Atlantic coasts of Morocco and British Isles.
ISSN:0017-0070
DOI:10.1080/11263508209428056
出版商:Taylor & Francis Group
年代:1982
数据来源: Taylor
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3. |
Long term effects of copper upon physiological processes and growth of Chlorella saccharophila (Krüger) Migula and Cyanidium caldarium Geitler |
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Giornale botanico italiano,
Volume 116,
Issue 3-4,
1982,
Page 123-129
Giovanni Aliotta,
Antonio Pollio,
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摘要:
It has been studied long term effects of copper upon physiological processes and growth ofChlorella saccharophila(Krüger) Migula andCyanidium caldariumGeitler, two algae which have the optimum of pH at 6,3 and 1,5 respectively. The algae differed markedly in their resistance to the copper. Infact, growth ofChlorella saccharophilashowed a lag time in presence of sublethal copper concentrations (0,25-1 mg/l). By contrast,Cyanidium caldariumwas about 4000 fold more tolerant to the metal. In both algae photosynthesis was more sensitive to applied copper than was respiration.
ISSN:0017-0070
DOI:10.1080/11263508209428057
出版商:Taylor & Francis Group
年代:1982
数据来源: Taylor
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4. |
A simple device allowing UV-detection of the active substances of Silybum marianum (L.) Gaertner on TLC plates devoid of fluorescent indicator |
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Giornale botanico italiano,
Volume 116,
Issue 3-4,
1982,
Page 131-133
ElsaM. Cappelletti,
Renata Trevisan,
Rosamaria Caniato,
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摘要:
A method for silybin, silydianin and silychristin (as well as taxifolin) visualization under long wave UV on silica gel TLC plates devoid of fluorescent indicator is described.
ISSN:0017-0070
DOI:10.1080/11263508209428058
出版商:Taylor & Francis Group
年代:1982
数据来源: Taylor
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5. |
N2-fixation by Alnus and Colletia |
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Giornale botanico italiano,
Volume 116,
Issue 3-4,
1982,
Page 135-142
Aldo Moretti,
Sergio Sabato,
GesualdoSiniscalco Gigliano,
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摘要:
Acetylene reduction by detached nodules ofAlnus cordata, A. glutinosaandColletia paradoxawas tested with respect to the effect of temperature on nitrogenase activity. Nodules were incubated at temperatures from 5°C to 45°C, exposed to C2H2generally for 1 hr, and sampled for C2H4. The maximum of activity occurred in all three species tested at about 25°C. The C2H2reduction rapidly declined at temperatures above the optimum and stopped at 40°C forA. glutinosaand 45°C forA. cordataandColletia paradoxa. Nodules of.A. cordatasubjected to 5°C recovered nitrogenase activity within 1 hr when the temperature was raised to 25°C, whereas loss of activity was irreversible at 45°C.A. cordatanodules tested in different seasons of the year showed similar activities in April and October with a slightly lower rate in August and a very much lower activity in January.
ISSN:0017-0070
DOI:10.1080/11263508209428059
出版商:Taylor & Francis Group
年代:1982
数据来源: Taylor
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6. |
Antrodia onychoides (Egel.) Ryv. specie nuova per l'Italia. II |
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Giornale botanico italiano,
Volume 116,
Issue 3-4,
1982,
Page 143-147
Annarosa Bernicchia,
Armando Furia,
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摘要:
Antrodia onychoides(Egel.)Ryv., new to Italy and very rare species in Europe. II. - The paper is concerned with the first Italian collection ofA. onychoides, a resupinate polypore. From the literature, this is the fourth European finding ofAntrodia onychoidesand follows the first collection, occurred in 1913 near Oslo, in Norway, the second in France and the third in Finland.
ISSN:0017-0070
DOI:10.1080/11263508209428060
出版商:Taylor & Francis Group
年代:1982
数据来源: Taylor
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7. |
Cytinus hypocistis L. embryogenesis: Some biological and ultrastructural aspects of fertilization and embryo development |
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Giornale botanico italiano,
Volume 116,
Issue 3-4,
1982,
Page 149-166
Roberto Ponzi,
Paolo Pizzolongo,
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摘要:
The present paper examines some biological and ultrastructural aspects of fertilization and early development of the embryo inCytinus hypocistis, a parasitic plant belonging to theRafflesiaceae. The probable functions of a mucilaginous substance contained in the ovary and embedding the numerous pollen tubes coming from the style are discussed.
ISSN:0017-0070
DOI:10.1080/11263508209428061
出版商:Taylor & Francis Group
年代:1982
数据来源: Taylor
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8. |
Germination and viability of the pollen of Crocus sativus L |
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Giornale botanico italiano,
Volume 116,
Issue 3-4,
1982,
Page 167-173
Giuseppe Chichiricco',
MariaGrilli Caiola,
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摘要:
Viability and germinability tests were carried out on the pollen ofCrocus sativusL., a sterile triploid commonly known as saffron. Pollen taken from dehiscent anthers was examined by means of vital staining and cytochemical techniques in order to detect its viability; germinationin vitrowas evaluated. From the results obtained it is evident that saffron pollen is viable at a high percentage (65%) but germinates at a very low percentage. Moreoverin vitrogermination is very slow, and is accompained by numerous morphological anomalies. The low germination of the pollen is due to the triploidy ofC. sativus.
ISSN:0017-0070
DOI:10.1080/11263508209428062
出版商:Taylor & Francis Group
年代:1982
数据来源: Taylor
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9. |
Considerazioni ecologiche, fitosociologiche e morfologiche sul genere Anthriscus Pers |
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Giornale botanico italiano,
Volume 116,
Issue 3-4,
1982,
Page 175-187
Krunica Hruška,
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摘要:
Ecological, plant geographical and morphological considerations on the genus Anthriscus Pers. - Analysis of the ecological, plant geographical and morphological characteristics of the genusAnthriscushas shown that his diffusion on broad geographical areas stays in connection with the transition of the single entities from the natural habitats to those semi-natural and synantropic. This passage is accompanied by a lowering of the inferior altitudinal limit of the distribution of the single species. In this genus has been observed a reduction series regarding the duration of the life cycle (from perennial herbs to biennal and annuals) and the size of the vegetative and reproductive apparatus.
ISSN:0017-0070
DOI:10.1080/11263508209428063
出版商:Taylor & Francis Group
年代:1982
数据来源: Taylor
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10. |
La composizione chimica dell'essudato stigmatico di Citrus limon (L.) Burm |
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Giornale botanico italiano,
Volume 116,
Issue 3-4,
1982,
Page 189-199
Antonio Tiezzi,
Mauro Cresti,
Fabrizio Ciampolini,
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摘要:
The composition of the stigmatic exudate of Citrus limon(L.)Burm. - Biochemical analyses of the stigmatic exudate ofCitrus limon(L.) Burm. have revealed the presence of lipids, polysaccharides, proteins, phenols, free aminoacids and alkaloids. The role of stigma secretion is discussed in relation to pollen activation and recognition and the pollen tube growth.
ISSN:0017-0070
DOI:10.1080/11263508209428064
出版商:Taylor & Francis Group
年代:1982
数据来源: Taylor
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