منابع مشابه
Transformation of the collateral vascular bundles into amphivasal vascular bundles in an Arabidopsis mutant.
Arabidopsis inflorescence stems develop a vascular pattern similar to that found in most dicots. The arrangement of vascular tissues within the bundle is collateral, and vascular bundles in the stele are arranged in a ring. Although auxin has been shown to be an inducer of vascular differentiation, little is known about the molecular mechanisms controlling vascular pattern formation. By screeni...
متن کاملStiffness gradients in vascular bundles of the palm Washingtonia robusta.
Palms can grow at sites exposed to high winds experiencing large dynamic wind and gust loads. Their stems represent a system of stiff fibrous elements embedded in the soft parenchymatous tissue. The proper design of the interface of the stiffening elements and the parenchyma is crucial for the functioning of the stem. The strategy of the palm to compromise between stiff fibre caps and the soft ...
متن کاملCRYPTOCHROME2 in vascular bundles regulates flowering in Arabidopsis.
Plants make full use of light signals to determine the timing of flowering. In Arabidopsis thaliana, a blue/UV-A photoreceptor, CRYPTOCHROME 2 (cry2), and a red/far-red photoreceptor, PHYTOCHROME B (phyB), are two major photoreceptors that control flowering. The light stimuli for the regulation of flowering are perceived by leaves. We have recently shown that phyB expression in mesophyll but no...
متن کاملSucrose synthase and invertase in isolated vascular bundles.
Vascular bundles were isolated from grapefruit (Citrus paradisi Macf.) during periods of rapid sucrose translocation into fruit. Invertase and sucrose synthase activities were assayed in these strands and compared with immediately adjacent tissues (inner most peel and segment epidermis) and phloem-free juice sacs during four growing seasons. Although sucrose synthase was present in sink cells, ...
متن کاملAn apple a day ...
To store apples, refrigerate them in a plastic bag or in the crisper drawer. Check the stored apples often – one bad apple can spoil the whole bag! When you cut a raw apple, it may turn dark. To prevent this, dip the pieces in a fruit juice like lemon, orange, grapefruit, or pineapple before combining with other ingredients. Right now, apples are in pretty good supply. Whether you buy locally g...
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ژورنال
عنوان ژورنال: Science
سال: 1904
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.20.521.889