与 «PROTOSTELE»相关的英语书籍
在以下的参考文献中发现
protostele的用法。与
protostele相关的书籍以及同一来源的简短摘要提供其在 英语文献中的使用情境。
1
Text Book Of Botany Diversity Of Microbes And Cryptogams
A protostele in which the central xylem core breaks into more or less parallel
plates is known as 9. A siphono stele with non-overlapping leaf gaps is known as
10. Protostele is a stele consisting of a central core of xylem, surrounded by a
band ...
2
The Origin of a Land Flora: A Theory Based Upon the Facts of ...
But there is a limit to the size which a solid protostele may attain with functional
advantage, and as a matter of fact when large size is approached the protostelic
character is sacrificed, and amplification begins, which may take several distinct ...
Frederick Orpen Bower, 1908
(A) Protostele The simplest type of stele comprises a central core of xylem
surrounded by phloem and then the pericycle. Jeffery, 1903 called it a protostele.
It is thought to be the most primitive type of stele. Two types of protosteles have
been ...
4
Paleobotany: The Biology and Evolution of Fossil Plants
Since the simplest and oldest stelar type is a protostele, it is hypothesized that
plants with siphonosteles evolved from pro- tostelic ancestors, and there are
examples in the fossil record that support this hypothesis. Two principal theories
have ...
Edith L. Taylor, Thomas N. Taylor, Michael Krings, 2009
5
Atlas of Woody Plant Stems: Evolution, Structure, and ...
THE PRIMARY STAGE OF GROWTH: THE ARRANGEMENT OF VASCULAR
BUNDLES IN MOSSES, LYCOPODS AND FERNS The stele (arrangement of
vascular bundles in shoots and roots) can be divided into two types: the
protostele ...
Fritz Hans Schweingruber, Annett Börner, Ernst-Detlef Schulze, 2007
6
Botany: An Introduction to Plant Biology
(d) Sporangia Columella Spores (c) Xylem Structure of Early Vascular Plants
Early vascular plants had two types of xylem organization. In both, the center is a
solid mass of xylem with no pith; this is a protostele. In an endarch protostele, ...
7
Botany For Degree Pteridophyta
The sporelings of all the species of Lycopodium show a central protostele with
radiating arms, i.e., actinostelic condition. When the sporelings grow the stelar
structure goes on becoming complex and shows variations in various species.
Stem Anatomy: Taylor and Millay (1981) reviewed the morphological variations of
stems in this group of plants and recognized in stelar organization an
evolutionary trend from solid protostele to the development of medullated stele.
Dunn et al.
9
Complete Biology for Medical College Entrance Examination:
Protostele: Solid core of xylem surrounded by phloem, pericycle and endodermis.
The types of protosteles are : • Haplostele: A protostele having a central smooth
core of xylem surrounded by phloem, pericycle and endodermis e.g., ...
10
A Complete Course in ISC Biology
STELE IN PTERIDOPHYTEJ * Important type* of steles found in pteridophytes
are: 1. Protostele : Solid core of xylem surrounded by phloem, pericycle and
endodermis. The types of protosteles are : (a) Haplostele : A protostele having
central ...
V. B. Rastogi, B. Kishore, 1997
包含词语«PROTOSTELE»的新条目
找出国内和国际出版社所讨论的内容，以及词语
protostele在以下新条目的上下文中是如何使用的。
Astronomii au descoperit o stea tanara si foarte fierbinte, veriga lipsa …
"Principala problema este ca lumina puternica provenita de la aceste protostele impinge materia din jur, iar la un moment dat steaua respectiva nu mai creste", ... «HotNews, 四月 15»
Cele mai tinere stele, de "numai" 25.000 de ani, pentru prima data in …
Este vorba despre mai multe protostele (astre aflate in stadiul incipient de formare) recent descoperite in Nebuloasa Orion, o zona spatiala unde astronomii au ... «Ziare.com, 三月 13»
Stele unice (Galerie foto)
... trecut, avand dimensiuni foarte mari, fiind numita si steaua gaura neagra. S-ar fi format atunci cand centrul unei protostele s-ar fi transformat in gaura neagra. «Ziare.com, 一月 13»
