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A study of latex and laticifer devel...

Lawson, Elizabeth Winpenny.

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A study of latex and laticifer development in Cryptostegia grandiflora.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	A study of latex and laticifer development in Cryptostegia grandiflora./
作者:	Lawson, Elizabeth Winpenny.
面頁冊數:	160 p.
附註:	Source: Dissertation Abstracts International, Volume: 50-03, Section: B, page: 0835.
Contained By:	Dissertation Abstracts International50-03B.
標題:	Biology, Botany. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8915143

A study of latex and laticifer development in Cryptostegia grandiflora.
Lawson, Elizabeth Winpenny.

A study of latex and laticifer development in Cryptostegia grandiflora. - 160 p.

Source: Dissertation Abstracts International, Volume: 50-03, Section: B, page: 0835.

Thesis (Ph.D.)--Cornell University, 1989.

This thesis describes the fine structure of laticifer cells and nature of components of the latex in the African rubber vine, Cryptostegia grandiflora R. Br., a member of the Asclepiadaceae. The latex of this species is a complex plant product, which yields economically important amounts of rubber upon tapping. Few electron microscopists have tackled laticifers because of the difficulty of examining such a large coenocytic system without introducing artifacts during the cutting of cells, necessary in order to observe them.Subjects--Topical Terms:

1017825
Biology, Botany.

A study of latex and laticifer development in Cryptostegia grandiflora.
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035 $a (UnM)AAI8915143
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100 1 $a Lawson, Elizabeth Winpenny. $3 1952556
245 1 2 $a A study of latex and laticifer development in Cryptostegia grandiflora.
300 $a 160 p.
500 $a Source: Dissertation Abstracts International, Volume: 50-03, Section: B, page: 0835.
502 $a Thesis (Ph.D.)--Cornell University, 1989.
520 $a This thesis describes the fine structure of laticifer cells and nature of components of the latex in the African rubber vine, Cryptostegia grandiflora R. Br., a member of the Asclepiadaceae. The latex of this species is a complex plant product, which yields economically important amounts of rubber upon tapping. Few electron microscopists have tackled laticifers because of the difficulty of examining such a large coenocytic system without introducing artifacts during the cutting of cells, necessary in order to observe them.
520 $a Chapter 1 describes the ultrastructure of embryonal laticifers in embryos excised from seeds that had imbibed water for forty-eight hours. Different types of fixations are examined and the relationship of the laticifers to the surrounding cells is described. In Chapter 2 transitional stages in laticifer development from five day seedlings to that of the mature plant are discussed. At maturity laticifers are giant cells with an active but peripherally restricted cytoplasm surrounding a large central vacuole in which latex is stored. Possible modes of formation of the central vacuole and sites of synthesis of rubber are discussed.
520 $a Chapter 3 provides a detailed description of the presence of microfilaments in laticifers in different parts of the plant and in different phases of their development. Microfilaments, which are actin-containing elements in animal and plant cells, are implicated as a motive force in cytoplasmic streaming and as an important structural component of the cytoskeleton. Microfilaments could function in both these roles in laticifers.
520 $a Latex is a complex emulsion. Fibrillar, crystalline, and alkaloidal components, rubber particles, and lutoids, the latter organelles peculiar to plant latex, are described with the negative staining technique in Chapter 4. Chapter 5 analyzes latex of C. grandiflora and other latex-producing genera, both closely related to C. grandiflora and from different families, using X-ray microanalysis.
590 $a School code: 0058.
650 4 $a Biology, Botany. $3 1017825
690 $a 0309
710 2 0 $a Cornell University. $3 530586
773 0 $t Dissertation Abstracts International $g 50-03B.
790 $a 0058
791 $a Ph.D.
792 $a 1989
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8915143