Abnormal Leaves and Flowers
نویسندگان
چکیده
منابع مشابه
Spontaneous symmetry breaking shaping flowers and leaves
Spontaneous symmetry breaking can result in emergence of complicated patterns in nature. Simple symmetry arguments can be used to describe beautiful and periodic rippled and wavy edges of flowers and leaves as well as fractal structure at the edge of a torn plastic sheet. In this paper, I will first discuss simple physical and geometrical arguments based on symmetry breaking and metrics on a cu...
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O R G A N S which are periodically repeated in plants show a more or less quantitative variation in spite of being governed by the same genotype. This variation is considered to be due, in addition to local fluctuation in environmental conditions outside and/or inside the plant body, to mistakes in the developmental course of organs resulting probably from the intrinsic nature of the organisms....
متن کاملSize control in plants--lessons from leaves and flowers.
To achieve optimal functionality, plant organs like leaves and petals have to grow to a certain size. Beginning with a limited number of undifferentiated cells, the final size of an organ is attained by a complex interplay of cell proliferation and subsequent cell expansion. Regulatory mechanisms that integrate intrinsic growth signals and environmental cues are required to enable optimal leaf ...
متن کاملVolatile constituents of essential oils isolated from flowers and leaves of Eupatorium cannabinum L. from Iran
Hydro-distilled volatile oils from the flowers and leaves of Eupatorium cannabinum L. which gathered in Touchal on Mountain Alborz (Tehran province) in Iran were investigated mainly by a combination of GC and GC/MS. Thirty-nine components were identified in the oils. The main constituents of the essential oils in flowers and leaves were germacrene D (27.3%, 37.1%), gemacrene B (12.4%, 11.7%) an...
متن کاملChemical Composition of the Essential Oils of Peucedanum ruthenicum M. Bieb. Leaves, Flowers and Fruits
The essential oils of Peucedanum ruthenicum M. Bieb. (Umbelliferae) leaves, flowers and fruits were prepared by hydrodistillation and analyzed by GC and GC-MS and the composition of the three essential oils were compared. Thirty-three, thirty-seven and thirty-one compounds were identified in leaves, flowers and fruits essential oils representing 89.13%, 88.66% and 76.45% of total oils respectiv...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1897
ISSN: 0006-8071
DOI: 10.1086/327593