Results 191 to 200 of about 13,844 (209)
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DIAPHRAGMS AND AERENCHYMA IN SCIRPUS VALIDUS
American Journal of Botany, 1971After the short‐lived apical meristem ceases activity, a basal intercalary meristem produces all new tissues in the aerial internode of Scirpus validus Vahl. These include extensions of the original vascular system and of the original partitioning walls as well as new vascular bundles and new walls which are produced in a predictable pattern ...
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HIGH CARBON DIOXIDE CONCENTRATIONS IN AERENCHYMA OF TYPHA LATIFOLIA
American Journal of Botany, 1992Diurnal and seasonal patterns of CO2 concentration ([CO2]) in leaf gas spaces were measured to better understand the relationship of sediment‐derived CO2 to photosynthesis in the emergent wetland species, Typha latifolia L. (cattail). Leaf [CO2] was above 2,000 μl/liter at dawn on all but the first sampling date.
John Y. H. Constable +2 more
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Enhancement of porosity and aerenchyma formation in nitrogen-deficient rice roots
Plant Science, 2014Root aerenchyma provides oxygen from plant shoots to roots. In upland crops, aerenchyma formation is induced mainly by oxygen or nutrient deficiency. Unlike upland crops, rice forms root aerenchyma constitutively and also inductively in response to oxygen deficiency.
Tomomi, Abiko, Mitsuhiro, Obara
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EFFECT OF ETHYLENE ON AERENCHYMA DEVELOPMENT
American Journal of Botany, 1981When applied to a part of stem or basal part of stem and root system, 1 ppm ethylene induced lysigenous aerenchyma development in the stem cortex of Helianthus annuus, Lycopersicon esculentum, and Phaseolus vulgaris. Local application of ethylene to a part of stem significantly increased the activity of cellulase in that part of stem in the above three
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ROLE OF CELLULASE IN AERENCHYMA DEVELOPMENT IN SUNFLOWER
American Journal of Botany, 1979A hypothesis that ethylene causes aerenchyma development in waterlogged plants through increased cellulase activity was tested with sunflower, Helianthus annuus L. Treatment with commercial cellulase induced aerenchyma development in sunflower stem sections.
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Programmed cell death during aerenchyma formation in Typha angustifolia leaves
Aquatic Botany, 2014Abstract To facilitate gas exchange, some plants produce specialized air cavities called aerenchyma. To determine how the aerenchyma is formed, we conducted serial experimental observations and tests. Here we provide evidence that aerenchyma is formed in Typha angustifolia leaves through cell lysis in which programmed cell death (PCD) is involved ...
Xi-Lu Ni +3 more
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Aerenchyma Formation and Methane and Oxygen Exchange in Rice
Soil Science Society of America Journal, 1993Abstract Limited information exists on the direct link between the intensity of soil reduction or anaerobiosis and gas exchange in rice ( Oryza sativa L.). A laboratory experiment was conducted to determine the extent to which specific levels of soil redox potential (Eh ...
H. K. Kludze +2 more
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Aerenchyma formation in roots of four banana (Musa spp.) cultivars
Scientia Horticulturae, 1999Abstract We assessed the impact of aeration and stagnation of the rooting medium on aerenchyma development and root porosity (total gas spaces) in four banana cultivars (cvs) using plantlets from tissue culture and from suckers. Aerenchyma formation in nodal roots of banana was expressed as percentage root porosity and cross sectional area of ...
E.A. Aguilar +2 more
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Programmed Cell Death and Aerenchyma Formation Under Hypoxia
2010This chapter describes the sequence of events leading to lysigenous aerenchyma formation in the roots of wetland and dryland plants. The events start from various stimuli that can induce cells to go through programmed cell death (PCD) in mid-cortical regions of the root: lack of oxygen (hypoxia), nitrogen, phosphorus or sulphur starvation and ...
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A Re‐examination of the Functional Significance of Aerenchyma
Physiologia Plantarum, 1972AbstractModel roots of known length and internal porosity were assayed for ROL (radial oxygen loss) by the cylindrical Pt electrode technique and a series of curves were obtained which express the inter‐relationships between ROL and diffusion path length over a wide range of internal porosity levels.The results indicate that internal porosity can exert
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