与 «MEGASPOROPHYLL»相关的英语书籍
在以下的参考文献中发现
megasporophyll的用法。与
megasporophyll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
The Evolutionary Biology of Plants
The megasporophyll was shed with its attached megasporangium, containing a
single functional megaspore. This reproductive unit appears to have been
adapted for water dispersal (Phillips 1979). The lamina of the megasporophyll
folded ...
2
Vascular Plants and Paleobotany
All glossopterid ovulate reproductive organs suggest a basic morphological
organization in which a vegetative leaf subtends a structure that bears ovules or
seeds. Historically, this seed-bearing unit has been termed a megasporophyll,
cupule ...
Philip Stewart, Sabine Globig, 2011
According to the most widely accepted hypothesis, the carpel constitutes a modi
ed, conduplicate megasporophyll bearing two, adaxial rows of ovules (Figure 6.9
D). (Recall that a me gasporophyll is a modi ed leaf that bears megasporangia, ...
4
New Organic Architecture: The Breaking Wave
In Cycas the number of ovules per megasporophyll is generally three or more,
although megasporophylls with one or two ovules occasionally occur (Schuster
1932; see also figure 5.6E). By comparison with the more complex fertile leaves ...
5
Geological Survey Professional Paper
Fortunately the individual cycadalean megasporophyll, though simply
constructed, is sufficiently diagnostic that the incomplete nature of the fossils
treated here does not detract substantially from their phylogenetic significance.
6
Gymnosperm (naked seeds plant) : structure and development
Lateral megasporophyll teeth less than 3 mm long 4. India — Cycas circinalis 4
Sri Lanka — Cycas nathorstii 3* Lateral megasporophyll teeth more than 4 mm
long 5. Lateral spines of megasporophyll lamina less than 10 mm long 6.
7
Cycad Classification: Concepts and Recommendations
Vegetative and reproductive characters measured from Cycas specimens: (1)
leaf length; (2) petiole length; (3) pinna number; (4, 8) pinna length; (5) pinna
width; (6) pinna basal width; (7) spacing between pinnae; (9) megasporophyll
length; ...
Terrence Walters, Roy Osborne, 2004
8
Diversity and Systematics of Seed Plants
A megasporophyll is differentiated into a basal stalk and an upper pinnate lamina
. Ovules are formed on the lateral sides of the stalk. The number of ovules varies
from 2-10, depending on the species. There is a great variation in the structure ...
Dr. Singh, Dr. Pande & Dr. Jain, 2009
Niklas and Norstog (1984) discussed the role of aerodynamics on reprodution
and the pattern of pollen deposition on megasporophyll of Cycas, strobili of
Dioon and Zamia, air disturbance pattern, influences arrangement of wind borne
pollen ...
10
Botany For Degree Gymnosperm (M.E.)
The ovules are large, erect (orthotropous) and slightly flattened in the plane of the
megasporophyll. Each ovule is enclosed in a thick coat, the integument. In Cycas
the integument is differentiated into three layers—the middle stony layer with ...
P C Vashishta, A K Sinha, Anil Kumar, P.C.Vasishta
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megasporophyll在以下新条目的上下文中是如何使用的。
Threatened Plants of the Philippines: Cycas curranii
Megasporophyll to 20 cm long, finely hairy. Seeds subglobose to ovoid, to 4 .5 cm long and to 4.0 cm wide, yellow. Sclerotesta longitudinally ... «Philippine Star, 二月 09»
