WATER RELATIONS OF PLANT CELLS. IV. DIFFUSION EFFECTS OBSERVED IN PLASMOLYSED TISSUES
نویسندگان
چکیده
منابع مشابه
Growth-induced Water Potentials in Plant Cells and Tissues.
A physical analysis of water movement through elongating soybean (Glycine max L. Merr.) hypocotyls was made to determine why significant water potentials persist in growing tissues even though the external water potentials were zero and transpiration is virtually zero. The analysis was based on a water transport theory modified for growth and assumed that water for growing cells would move thro...
متن کاملTeaching about Water Relations in Plant Cells: An Uneasy Struggle
University students often struggle to understand the role of water in plant cells. In particular, osmosis and plasmolysis appear to be challenging topics. This study attempted to identify student difficulties (including misconceptions) concerning osmosis and plasmolysis and examined to what extent the difficulties could be revised during a plant physiology course. A questionnaire was developed ...
متن کاملA circuit analog model for studying quantitative water relations of plant tissues.
Using arrays of resistors and capacitors, a lumped circuit analog of plant tissue is developed. The circuit elements of the analog are identified in terms of physiological variables (hydraulic conductivities, water capacities, and cell dimensions) which can be measured in the laboratory. With the aid of a circuit simulation subroutine, the model was solved to predict water potential distributio...
متن کاملRehydration versus Growth-induced Water Uptake in Plant Tissues.
Experiments show that the rate of water uptake by living tissues external to mature xylem of cotton stems (Gossypium hirsutum L. Auburn 7-683) is very similar to the corresponding curves for leaf tissue. In both cases one obtains a two-phase curve with phase I corresponding to passive rehydration and phase II pertaining to active growth.A theory of water movement in plant tissue first proposed ...
متن کاملEffects of N Fertility on Plant Water Relations and Stomatal Responses to Water Stress in Irrigated Cotton'
Cotton (Gossypium hirsutum L.) was grown in Phoenix, AZ, in 1981 and 1982. In both years it was irrigated with either 10 or 15 cm of water per application; N was supplied at three rates within each water treatment. Stomatal conductances of the most recently expanded leaves were followed during irrigation cycles to determine effects of N fertility on stomatal responses to water stress. Differenc...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: New Phytologist
سال: 1946
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1946.tb05041.x