Download e-book for kindle: A revision of Clavija - Opera Botanica 107 (Theophrastaceae) by Bertil Ståhl.

By Bertil Ståhl.

ISBN-10: 8788702561

ISBN-13: 9788788702569

Show description

By Bertil Ståhl.

ISBN-10: 8788702561

ISBN-13: 9788788702569

Show description

Read or Download A revision of Clavija - Opera Botanica 107 (Theophrastaceae) PDF

Best plants: botany books

Download PDF by S. Inderjit: Invasive Plants: Ecological and Agricultural Aspects

Invasive vegetation have an effect on international biodiversity and surroundings functionality, and their administration is a fancy activity. the purpose of this e-book is to debate primary questions of invasion ecology, comparable to why specific groups turn into extra invasible than others, what the mechanisms of exclusion of local species by means of invaders are, and no matter if invasion will be anticipated.

Read e-book online The botanical cabinet, consisting of coloured delineations PDF

This can be a replica of a booklet released ahead of 1923. This ebook could have occasional imperfections equivalent to lacking or blurred pages, terrible images, errant marks, and so forth. that have been both a part of the unique artifact, or have been brought through the scanning method.

Read e-book online flora italia PDF

Chiave botanica basata vegetation d'Italia di Sandro Pignatti del 1982. Versione con Compositeae, Labiateae, Rosaceae, Leguminosae, Graminaceae e Orchidaceae. l. a. versione aggiornata è disponibile sul sito http://www. florae. it

Extra resources for A revision of Clavija - Opera Botanica 107 (Theophrastaceae)

Example text

1974. Pollen pore development and its spatial orientation during microsporogenesis in the grass Sorghum bicolor. Amer. J. Bot. 61:604–623. , and D. Firmage. 2000. Pollen viability and longevity: Practical, ecological and evolutionary implications. Plt. Syst. Evol. 222:113–132. , and D. Lewis. 1973. The formation of the tryphine coating the pollen grains of Raphanus, and its properties relating to the selfincompatibility system. Proc. Roy. Soc. London, Ser. B. 184:149–165. Gori, P. 1982. Accumulation of polysaccharides in the anther cavity of Allium sativa, clone Piemonte.

Within the placentoidal pollen sac of sweet pepper, stages of pollen development were shown in cross-sectional view by Horner and Rogers (1974). Sporogenous cells form only two layers in the pollen sac (Fig. 5A); therefore, each sporogenous cell is in physical contact with the parietal tapetum. 5A also shows that tapetal cells toward the outside of the pollen sac (at top) are smaller than tapetal cells that line the inner placentoid-facing connective (at bottom). Here and in some other plants, it has been speculated without any evidence that the enlarged tapetal cells are larger because they are closer to vascular bundles in the connective and therefore more active in transfer of nutrients.

Planta 213:71–79. E. 1972. Developmental Aspects of Microsporogenesis in Sorghum bicolor. D. Dissertation, Iowa State University. T. Horner, Jr. 1974. Pollen pore development and its spatial orientation during microsporogenesis in the grass Sorghum bicolor. Amer. J. Bot. 61:604–623. , and D. Firmage. 2000. Pollen viability and longevity: Practical, ecological and evolutionary implications. Plt. Syst. Evol. 222:113–132. , and D. Lewis. 1973. The formation of the tryphine coating the pollen grains of Raphanus, and its properties relating to the selfincompatibility system.

Download PDF sample

A revision of Clavija - Opera Botanica 107 (Theophrastaceae) by Bertil Ståhl.


by Steven
4.1

Rated 4.73 of 5 – based on 33 votes