The Developmental Morphology of Leea guineensis. I. Vegetative Development

1990 ◽  
Vol 151 (2) ◽  
pp. 204-209 ◽  
Author(s):  
Christian R. Lacroix ◽  
Jean M. Gerrath ◽  
Usher Posluszny
Keyword(s):  
Developmental Morphology ◽  
Vegetative Development

Studies in the Alismataceae. I. Developmental morphology of Echinodorus tenellus

1968 ◽  
Vol 46 (11) ◽  
pp. 1345-1360 ◽  
Author(s):  
W. A. Charlton
Keyword(s):  
Regular Sequence ◽  
Axillary Buds ◽  
Developmental Morphology ◽  
Vegetative Development ◽  
Reproductive Shoot ◽  
Terminal Flower ◽  
Stage Of Development ◽  
Foliage Leaf ◽  
Unlimited Growth ◽  
Regular Alternation

Development of each shoot of Echinodorus tenellus proceeds through a vegetative phase when foliage leaves are formed and enters an abruptly initiated reproductive phase, when only scale leaves are formed, by conversion of the meristem into a different form, while a large and precocious bud in the axil of the last foliage leaf continues vegetative development. The reproductive meristem may, according to conditions, form an inflorescence or a “pseudostolon” with vegetative axillary buds in place of flowers. Both inflorescence and pseudostolon show a regular sequence of long and short internodes and a regular alternation of scale leaves with and without axillary buds, though the pattern of the inflorescence is less regular than that of the pseudostolon and the inflorescence has a terminal flower while the pseudostolon has unlimited growth. Phyllotaxis varies according to the stage of development of the plant and in the reproductive shoot is largely determined by the patterns of internode elongation and bud distribution. The significance of the developmental pattern is discussed.

scholarly journals Vegetative phase change in Populus tremula x alba

2020 ◽  
Author(s):  
Erica H. Lawrence ◽  
Aaron R. Leichty ◽  
Cathleen Ma ◽  
Steven H. Strauss ◽  
R. Scott Poethig
Keyword(s):  
Phase Change ◽  
Populus Tremula ◽  
Quaking Aspen ◽  
List Type ◽  
Developmental Morphology ◽  
Vegetative Development ◽  
Vegetative Phase ◽  
Vegetative Phase Change

SummaryPlants transition through juvenile and adult phases of vegetative development in a process known as vegetative phase change (VPC). In poplars (genus Populus) the differences between these stages are subtle, making it difficult to determine when this transition occurs. Previous studies of VPC in poplars have relied on plants propagated in vitro, so the normal nature of this process is still unknown.We examined developmental morphology of seed-grown and in vitro derived Populus tremula x alba (clone 717-1B4), and compared the phenotype of these, to plants over- and under-expressing miR156, the master regulator of VPC.In seed-grown plants, most traits changed from node-to-node during the first 3 months of development but remained relatively constant starting around node 25. Most of these traits remained unchanged in clones over-expressing miR156, demonstrating they are regulated by the miR156/SPL pathway. Leaf fluttering--a characteristic of Populus tremula (“quaking aspen”)--is one of these miR156-regulated traits.Vegetative development in plants grown from culture mirrored that of seed-grown plants, allowing direct comparison between plants often used in research and those found in nature. These results provide a foundation for further research on the role of VPC in the ecology and evolution of this economically important genus.

Bed behavioral assessment of tomato varieties in Cote d Ivoire

2015 ◽  
Vol 5 (1) ◽  
pp. 513-522
Author(s):  
Jean-Claude N'ZI ◽  
Lassina FONDIO ◽  
Mako Francois De Paul N’GBESSO ◽  
Andé Hortense DJIDJI ◽  
Christophe KOUAME
Keyword(s):  
Behavioral Assessment ◽  
Development Stage ◽  
Research Centre ◽  
Vegetative Development ◽  
Potential Yield ◽  
Tomato Plants ◽  
Bacterial Diseases ◽  
Damage Rate ◽  
Fruit Damage ◽  
Tomato Breeding

Thirty accessions of tomato including twenty eight introduced accessions from The World Vegetable Center-AVRDC and as controls, two commercial varieties Mongal and Calinago, were assessed for agronomic performances at the Experimentation and Production Station of Angud dou of the National Agronomic Research Centre (CNRA) located in the South of Cote d Ivoire. The trial was arranged in a randomized block with three replications. The following parameters were determined at vegetative development stage: plant height at flowering stage, susceptibility of accessions to diseases, day to 50% flowering and day of first harvest, production duration, fruit length, fruit diameter, total number of fruits, number of fruits per plant, potential yield, net yield and fruit damage rate. Results showed that the commercial variety Mongal, with a potential yield of 15.9 and a net yield of 13.1 t ha-1, was the most productive. All the introduced accessions from AVRDC recorded the lowest potential yields from 2.2 to 9.7 t ha-1, and net yields from 1.7 to 8.6 t ha-1. In addition, accessions WVCT8, FMTT847 and WVCT13 were severely infested by bacterial wilt. The reduction of the net yield of tomato accessions resulted in the high fruit damage rates. For the future tomato breeding work, it would be appropriate to introduce into the trials bacterial diseases tolerant varieties. Moreover, some studies could be undertaken to determine the nature of the bacteria involved in the plant wilting and to find out the causal agent of the tomato plants burning at the fructification stage reducing the harvest duration.

Vegetative Development and Organic Reserves of Tall Fescue Under Conditions of Accumulated Growth 1

Crop Science ◽  
1967 ◽  
Vol 7 (5) ◽  
pp. 409-412 ◽  
Author(s):  
Restituto R. Lopez ◽  
Arthur G. Matches ◽  
J. D. Baldridge
Keyword(s):  
Tall Fescue ◽  
Vegetative Development

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 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
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