Developmental Morphology of Platycerium coronarium (Koenig) Desv

1981 ◽  
Vol 47 (6) ◽  
pp. 805-816 ◽  
Author(s):  
B. AWAN ◽  
A. N. RAO
Keyword(s):  
Developmental Morphology ◽  
Platycerium Coronarium

Developmental morphology and anatomy of the reproductive structures in sunflower (Helianthus annuus): a unified temporal scale

Botany ◽  
2015 ◽  
Vol 93 (5) ◽  
pp. 307-316 ◽  
Author(s):  
L.I. Lindström ◽  
L.F. Hernández
Keyword(s):  
Disease Resistance ◽  
Helianthus Annuus ◽  
Oil Content ◽  
Genetic Selection ◽  
Reproductive Development ◽  
Developmental Morphology ◽  
Male And Female ◽  
Reproductive Structures ◽  
Selection For ◽  
Growing Conditions

In sunflower (Helianthus annuus L.), there has been an intense genetic selection for achenes with agronomic value, such as greater mass, oil content, and disease resistance. However, the information regarding the anatomical events that control their growth and maturation is surprisingly scarce. The aim of the present work was to study sunflower male and female sporogenesis and gametogenesis, as well as cell division and enlargement and tissue differentiation in the ovary and the embryo, linking the timing of these events to two frequently used phenological scales and a thermal time scale. In addition, we propose an ontogenetic scale that integrates the results of the present work to that of previous studies on sunflower reproductive development. The unified scales presented here provide a framework for others to investigate the relationships uncovered in this study in different genetic backgrounds and under different growing conditions.

scholarly journals Morphological and Tissue Culture Studies of Platycerium coronarium, a Rare Ornamental Fern Species from Malaysia

2011 ◽  
Vol 101 (4) ◽  
pp. 241-251 ◽  
Author(s):  
Rosna Mat Taha ◽  
Noorma Wati Haron ◽  
Sharifah Nurashikin Wafa
Keyword(s):  
Tissue Culture ◽  
Culture Studies ◽  
Platycerium Coronarium ◽  
Fern Species

scholarly journals Developmental Morphology of the Small Intestine of African Ostrich Chicks

2008 ◽  
Vol 87 (12) ◽  
pp. 2629-2635 ◽  
Author(s):  
J.X. Wang ◽  
K.M. Peng
Keyword(s):  
Small Intestine ◽  
Developmental Morphology

Developmental morphology of the cyprinid fish Horadandia atukorali

2005 ◽  
Vol 52 (2) ◽  
pp. 152-157 ◽  
Author(s):  
Tetsuya Sado ◽  
Seishi Kimura
Keyword(s):  
Cyprinid Fish ◽  
Developmental Morphology

Developmental Morphology of New World Podostemaceae: Marathrum and Vanroyenella

1999 ◽  
Vol 160 (1) ◽  
pp. 29-45 ◽  
Author(s):  
Rolf Rutishauser ◽  
Alejandro Novelo R. ◽  
C. Thomas Philbrick
Keyword(s):  
New World ◽  
Developmental Morphology

Developmental Morphology of the Skin and Hair Follicles in Normal and in “Ragged” Mice

Development ◽  
1962 ◽  
Vol 10 (4) ◽  
pp. 507-529
Author(s):  
J. Slee
Keyword(s):  
Hair Growth ◽  
Mutant Gene ◽  
Hair Follicles ◽  
Mutant Mice ◽  
Developmental Morphology ◽  
Adult Morphology ◽  
Dominant Mutant

Ragged (Ra) is a semi-dominant mutant gene which was first reported by Carter & Phillips (1954). The adult morphology, the genetics, and the embryology of the mutant mice were described by Slee (1957 a, b). It was found that adult ragged heterozygotes (Ra+) had sparser coats than normal, many of their hair follicles being incompletely developed and non-functional. Ragged homozygotes (RaRa) were almost naked. Most of their pelage hair follicles were either absent, or abnormal and non-functional. Ra+ embryos could be identified from 16 days' gestation by the retardation of their sinus hair-growth. RaRa embryos were characterized from 13 days' gestation by the occurrence of a generalized subcutaneous oedema which persisted until birth, and also by retardation in the development of their sinus hairs and follicles. Pelage follicle primordia appeared at the normal time (14 days' gestation) in Ra+ and RaRa embryos but subsequently developed slowly in RaRa embryos, especially when the oedema was pronounced.

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