Results 211 to 220 of about 1,697,964 (253)

Leaf morphology shift linked to climate change [PDF]

Biology Letters, 2012
Climate change is driving adaptive shifts within species, but research on plants has been focused on phenology. Leaf morphology has demonstrated links with climate and varies within species along climate gradients. We predicted that, given within-species variation along a climate gradient, a morphological shift should have occurred over ...
Greg R. Guerin, Andrew J Lowe
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Morphological features for leaf based plant recognition

2013 IEEE International Conference on Image Processing, 2013
Although plant recognition has become an increasingly popular research topic, it remains nonetheless a scientific and technical challenge. Besides all the difficulties of classic object recognition, such as illumination, viewpoint and scale variations, plants can additionally exhibit visual changes depending on their age and condition, thus demanding a
Erchan Aptoula, Berrin A. Yanikoglu
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Influence of Sulphur Nutrition on Leaf Morphology

Nature, 1952
IN connexion with certain experiments dealing with the influence of sulphur nutrition on tobacco mosaic virus, the number of local lesions per unit leaf area was used as the criterion of susceptibility to the virus. The procedure involved the rubbing of a suspension of the virus on selected leaves of Nicotiana glutinosa, the test plant.
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The developmental morphology and growth dynamics of the tobacco leaf

Planta, 1985
The developmental morphology and growth dynamics of the leaf of Nicotiana tabacum L. cv. Xanthi Nc. are described. Epidermal and internal cell patterns indicate that the leaf axis arises from approx. 100 cells in four layers of the shoot apex, while the lamina arises from several rows of cells in each of three layers of the leaf axis.
R S, Poethig, I M, Sussex
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Mutations Altering Leaf Morphology in Tomato

International Journal of Plant Sciences, 2001
We examined leaf morphology, anatomy, and margin development in wild‐type and mutant leaves in order to define the genetic pathways controlling the different stages of leaf development in tomato. Tomato mutants were placed into four categories based on the degree of leaf complexity and margin development.
Sharon Kessler, Minsung Kim, Thinh Pham, Natalie Weber, Neelima Sinha   +4 more
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Leaf morphology of the imbricate-leaved Podocarpaceae

Australian Systematic Botany, 1989
The leaf arrangement and cuticular micromorphology of living species of the Podocarpaceae with an imbricate leaf arrangement demonstrates that generic determination is possible on this basis alone. This is of particular interest in Dacrydium, Halocarpus, Lepidothamnus and Lagarostrobos, which until recently were considered to be monogeneric.
PM Wells, RS Hill
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Morphology and development of leaf papillae in Sematophyllaceae

The Bryologist, 2010
Abstract Micro-morphological studies on mosses are not common, but have the potential to illuminate the nature of taxonomic characters. Data on the structure and development of leaf cell papillae in the Sematophyllaceae obtained using light and scanning electron microscopy techniques are presented to assess developmental similarity and congruence with ...
Paulo E. A. S. Câmara, Elizabeth A. Kellogg   +1 more
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Soybean Leaf Morphology and Defoliation Tolerance

Agronomy Journal, 1998
AbstractPlant tolerance to pest injury is an ideal component of integrated pest management (IPM) programs, because it places no selection pressure on pest populations, but tolerance is little understood and its use in pest management is limited. In field experiments in 1994, 1995, and 1996, we characterized tolerance to defoliation in ‘Clark’ soybean ...
Fikru J. Haile, Leon G. Higley, James E. Specht, Stephen M. Spomer   +3 more
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Parallel evolution of leaf morphology in gnetophytes

Organisms Diversity & Evolution, 2015
In the present paper, an ephedroid macrofossil species from the Early Cretaceous Yixian Formation of western Liaoning of China is described as new to science: Ephedra multinervia Yang et Lin, sp. nov. This species has typical ephedroid morphology, e.g.
Yang, Yong, Lin, Longbiao, Ferguson, David K.   +2 more
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Ontogeny of Leaf Morphology and Anatomy

1985
Because of their role in intercepting and absorbing radiant energy, and transforming it to energy of organic substances through the complex process of photosynthesis, leaves are the most important organs for plant production, and hence for agriculture.
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