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WHAT DOES MEGASPOROPHYLL MEAN IN ENGLISH?
A sporophyll is a leaf that bears sporangia. Both microphylls and megaphylls can be sporophylls. In heterosporous plants, sporophylls bear either megasporangia, or microsporangia. The overlap of the prefixes and roots makes these terms a particularly confusing subset of botanical nomenclature. Sporophylls vary greatly in appearance and structure, and may or may not look similar to sterile leaves. Plants that produce sporophylls include: Alaria esculenta a brown alga shows sporophylls attached near the base of the alga. Lycophytes, where sporophylls may be aggregated into strobili or distributed singly among sterile leaves. Sporangia are distinctively borne in the axil or on the adaxial surface of the sporophyll. In heterosporous members, megasporophylls and microsporophylls may be intermixed or separated in a variety of patterns. Ferns, which may produce sporophylls that are similar to sterile fronds or that appear very different from sterile fronds. These may be non-photosynthetic and lack typical pinnae Cycads produce strobili, both pollen-producing and seed-producing, that are composed of sporophylls.
The translations of megasporophyll from English to other languages presented in this section have been obtained through automatic statistical translation; where the essential translation unit is the word «megasporophyll» in English.
List of principal searches undertaken by users to access our English online dictionary and most widely used expressions with the word «megasporophyll».
FREQUENCY OF USE OF THE TERM «MEGASPOROPHYLL» OVER TIME
The graph expresses the annual evolution of the frequency of use of the word «megasporophyll» during the past 500 years. Its implementation is based on analysing how often the term «megasporophyll» appears in digitalised printed sources in English between the year 1500 and the present day.
Examples of use in the English literature, quotes and news about megasporophyll
10 ENGLISH BOOKS RELATING TO «MEGASPOROPHYLL»
Discover the use of megasporophyll in the following bibliographical selection. Books relating to megasporophyll and brief extracts from same to provide context of its use in English literature.
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
Karl J. Niklas, 1997
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,
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, ...
Michael G. Simpson, 2011
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 ...
David Pearson, 2001
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.
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.
V.P. Singh, 2006
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
Terrence Walters, Roy Osborne, 2004
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
Dr. C. M. Govil
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
NEWS ITEMS WHICH INCLUDE THE TERM «MEGASPOROPHYLL»
Find out what the national and international press are talking about and how the term megasporophyll is used in the context of the following news items.
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, Feb 09»
« EDUCALINGO. Megasporophyll [online]. Available <https://educalingo.com/en/dic-en/megasporophyll>. Oct 2019 ».