摘要:

RESEARCHES ON THE PHYSIOLOGY OF MITOSIS: ACTION OF MALONATE AND IODACETATE ON DIVISION AND DISTENSION GROWRH OF CELLS OF WHEAT SEEDLINGS ROOTS. —The effect of malonate and iodacetate was studied on cell distension and on the mitosis of etiolated, intact or deprived of caryopsis wheat seedlings. At the same time the variation in the exigen uptake of such plants or root segments placed in the above inhibitors was studied by the Warburg apparatus. The oxigen uptake indicated that the response of the roots to the two inhibitors used is greatest in the first hours and then decreases more or less rapidly. An early almost total and irreversible inhibition of cell distension corresponds to the early decrease in the oxigen uptake.

ISSN:0017-0070    

DOI:10.1080/11263506109430330

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

SOME ROCK HABITATS NEAR MONOPOLI (APULIA), WITH NOTES ON THE AREA OF DISTRIBUTION OFCAMPANULA VERSICOLORSIB. ET SM., CARUM MULTIFLORUM BOISS., andSCROPHULARIA LUCIDA L. — At Monte San Nicola, near Monopoli (Apulia), half way up a steep slope at ca. 200 m. o. s. I., some vertical limestone rocks harbour a saxatile community which includes some species more or less rare in Apulia.

ISSN:0017-0070    

DOI:10.1080/11263506109430331

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

INIBITION OF GREENING BY INDOLACETIC ACID AND ITS PREVENTION BY ASCORBIC ACID. —Stem apex portions from etiolated pea plants(Pisum sativum var. Alaska) were grown in a dark room thermoregulated at 25°C until the development of the third internode and after excission kept in light for 20 hours. Greening on these isolated portions is sharply inhibited by indolacetic acid at concentrations varying from 10−3M to 10−6M. The highest inhibition, that is about 40%, correspònds to the highest concentrations (10−3M). A scarcely significant stimulus is registered at the 10−6M concentration of indolacetic acid.

ISSN:0017-0070    

DOI:10.1080/11263506109430332

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

HISTOGENESIS AND ANATOMICAL CHARACTERISTICS OF PORTIONS OF SOLANUM TUBEROSUM SPROUTS CULTIVATED IN VITRO. —Disks cut from sprouts of Solanum tuberosum L. have been cultured on White's basic or modified medium (White, 1943) with 20 mg/l KH22PO450 mg/l adenine, and 12 or 24 mg/l NAA.

ISSN:0017-0070    

DOI:10.1080/11263506109430333

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

OBSERVATIONS ON THE CARYOLOGY OF GENNARIA DIPHYLLA (LINK) PARL. (COELOGLOSSUM DIPHYLLUM FIORI) —Some caryological characters ofGennaria diphylla(Link) Parl, have been here investigated. Chromosome counts from somatic metaphases show a 34 chromosomes diploid set; the resting nuclei have been classified as half-reticulated with chromocenters (« noyaux semi-reticulé à chromocentres » according toDelay'sclassification); in prophases we have noticed that chromocenters often appear like prochromosomes. The chromosome number 17 (2n = 34) is new for theOphrydinae.

ISSN:0017-0070    

DOI:10.1080/11263506109430334

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

STUDIES ON THE PHYSIOLOGY OF TOXIN PRODUCTION BYHELMINTHO-SPORIUM MAYDISNISHIK. ET MIY. CULTURES. — Helminthosporium maydisproduces under artificial culture toxic metabolites, which are responsible of a reduction of wheat and corn rootlets growth, severe alterations in tomato shoots and young corn plants, and growth inhibition of some microrganisms.

ISSN:0017-0070    

DOI:10.1080/11263506109430335

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

VARIATIONS IN THE CHARACTERISTICS OF THE SEEDS IN SOME GRAMI-NACEAE INCLUDED THE PHENOMENON OF «YELLOW BERRIES «IN» TRITICUM DURUM DESF. —An analysis of the morphological and physiological characteristics of normal seeds and yellow barries of « Cappelli» (Triticum durum)and of normal and red seeds ofHaynaldia villosahas given the following results:

ISSN:0017-0070    

DOI:10.1080/11263506109430336

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

OBSERVATIONS ON THE RELATION BETWEEN PROTOPLASMIC ACCUMULATION OF THE FLUOROCHROME URANIN AND RESPIRATORY INTENSITY IN OSCILLATORIA IRRIGUA Kütz. — Uranin (sodic fluorescein) is a vital dye of peculiar cytophysiological interest, since it is accumulated chiefly in the nucleus, cytoplasm and chondriosomes of living plants cell. The degree of accumulation of this dye is in evident relation with the cellular activity.

ISSN:0017-0070    

DOI:10.1080/11263506109430337

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

OBSERVATIONS ON A SPECIAL CASE OF WOUND HEALING IN AN OLIVE TREE DAMAGED BY LOW TEMPERATURE IN FEBRUARY 1956. —The authors have observed an unusual form of woung healing in an olive tree damaged by low temperature in 1956, and have studied its morphological and anatomical details.

ISSN:0017-0070    

DOI:10.1080/11263506109430338

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

The Author, on the basis of numerous results of pollen analysis on turfy-clayey deposits especially in Delta Padano, shows the gradual impoverishment, the main ancient species(Pinus haploxylon, Abies nordmanniana, Tsuga, Cedrus, Carya, Pterocarya, Zelkova, Castanea latifolia)suffered from during middle and upper Pleistocene.

ISSN:0017-0070    

DOI:10.1080/11263506109430339

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor