摘要:

Length ratios between root, hypocotyl and cotyledons during the germination of pine seeds. —Germination ofPinus Pineahas been studied from a morphological point of view, recording the change of dimensions of the three parts of the embryo, that is cotyledons, hypocotyl and rootlet. As soon as the embryo starts germinating the three parts above mentioned do not keep the embryonic length ratios, expecially the length ratio cotyledons + hypocotyl/rootlet is upset, as the root elongates very rapidly. During this process the equilibrium point is reached inPinus Pineawhen the radicle protrudes 2–3 mm. from the seed.

ISSN:0017-0070    

DOI:10.1080/11263506509430817

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

Endosperm embryo interrelationships during germination ofPINUS PINEAL. 1rst note. —Seeds and excised embryos have been cultured in vitro in the dark. Experiments with ripe seeds and embryos have been paralleled with exper. with unripe ones (6 months before natural seed dispersal). The results are as follows:

ISSN:0017-0070    

DOI:10.1080/11263506509430818

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

Prove di germinazione di semi diPINUS PINEAal buio. —Sono state condotte prove di coltivazioni di embrioni diPinus pineaal buio in rapporti vari col loro endosperma. 1aprova: semi con endosperma amputato all'apice calazale (cotiledonare) per la lunghezza di mm. 1, mm. 2, mm. 3. Il resultato è stato l'accrescimento dell'embrione clorotico con radice atrofica, cioè non si è avuto la normale evoluzione morfogenetica dell'embrione in plantula. 2aprova: asportazione dei 2/3 micropilari, (radicolari) dell'endosperma: evoluzione normale dell'embrione in plantula, cioè germinazione di una plantula normalmente verde con radichetta molto ben sviluppata. 3aprova: asportazione di uno spicchio longitudinale di endosperma: normale germinazione di una plantula verde e con radichetta sviluppata, ma minore sviluppo in lunghezza dei cotiledoni corrispondenti allo spicchio di endosperma asportato.

ISSN:0017-0070    

DOI:10.1080/11263506509430819

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

Endosperm embryo interrelationships during germination ofPINUS PINEAL. (2nd Note). —Experiments have been performed with unripe fresh seeds paralleled with unripe stored seeds (50 days of storage).

ISSN:0017-0070    

DOI:10.1080/11263506509430820

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

Histological and anatomical modifications in the root apex ofPINUS PINEAL. seedlings grown in vitro from immature seeds, in the dark. —The seeds ofPinus pineaL. take three years to develop reaching maturity during the spring of the forth year. Immature seeds were collected at successive stages and cultivated in vitro in Heller's medium. The seedlings showed atrophy of the root togheter with histological and anatomical modifications of the root apex and formation of a small tuber. The extent of these modifications depends on the age of the seed and on how long the seedling is cultivated in vitro.

ISSN:0017-0070    

DOI:10.1080/11263506509430821

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

New or interesting Lichens of italian coasts. —The autor describes a lichen new to Italy, Acarospora microcarpa(Nyl) Wedd, a mediterranean species, found in southern France only hitherto. The lichen was gathered on the tufs rocks of the Isle of Procida; so the species is classed among the cryptogamic flora of phlegrean tufs.

ISSN:0017-0070    

DOI:10.1080/11263506509430822

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

An interesting discovery in the Maritim Alps flora.ARTEMISIA CAMPHORATAVill. with galls ofDIARTHRONOMYIA KIEFFERITrotter. Its geographical distribution and phytogeographical analysis. —The Author signals the finding, in the Maritim Alps flora, of some stations of an interesting discovery:Artemisia camphorataVill. with galls ofDiarthronomyia (Rhopalomyia) KiefferiTrotter, and explains the characteristics of this Cecidomyide, (gall-midge).

ISSN:0017-0070    

DOI:10.1080/11263506509430823

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

About some « Carex » new for the Marche Region or for the Adriatic side of the Italian Peninsula. —We give information about the presence in the Marche region of six new or unpublishedCarexin this district; they are:C. distachyaDesf., C. GrioletiRoem., C. pallescensL., C. nitidaHost, C. olbiensisJord. andC. depauperataGood. Amongst them, we must considerC. Grioletias new in the whole Adriatic basin, whileC. nitida, C. olbiensisandC. depauperataresult as new or unpublished in the whole Adriatic side of the Italian Peninsula, or in a good part of it. Information is given about the distribution and the ecology of every single species in this district; we linger especially over theC. Grioleti,for the particular importance and significance of this taxon.

ISSN:0017-0070    

DOI:10.1080/11263506509430824

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

Wood ring evolution in male and female plants ofGINKYO BILOBAL. —A morphological examen of the wood rings inGinkyo bilobaL. has been performed on stem sections from specimens of the Botanical Institute of Florence, on wood samples from the collection of Adriano Fiori and on wood cores extracted from the stem of male and female plants growing in the Botanical Garden of Florence.

ISSN:0017-0070    

DOI:10.1080/11263506509430825

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor

摘要:

TRINIA DALECHAMPIIin the Illyric component of the Flora of the Apuan Alps. —On a mountaintop in the Apuan Alps, the author foundTrinia dalechampii,an Illyric entity known until now in Ytaly only in the central and southern Apennines. He also indicates that a Greco-Apennine Oligo-Miocene bridge was the probable migration-route of this species and likewise of the Illyric entities of the Apennines.

ISSN:0017-0070    

DOI:10.1080/11263506509430826

出版商:Taylor & Francis Group    

年代:1965

数据来源: Taylor