منابع مشابه
Aquaporins: highly regulated channels controlling plant water relations.
Plant growth and development are dependent on tight regulation of water movement. Water diffusion across cell membranes is facilitated by aquaporins that provide plants with the means to rapidly and reversibly modify water permeability. This is done by changing aquaporin density and activity in the membrane, including posttranslational modifications and protein interaction that act on their tra...
متن کاملAquaporins. A molecular entry into plant water relations.
Water relations are obviously crucial to the physiology of terrestrial plants, but 25 years ago most plant biologists viewed this area of research as somewhat of an oddity. Dominated by equations and unusual physical theories about liquids flowing in pipes, water relations seemed to be a field with little seeming need for the burgeoning concepts and approaches offered by molecular and cellular ...
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 کاملRelations Relating Relations
The aim of the current work is to incorporate structural information in judgments of similarity . According to the assumption of feature independence, how one feature affects similarity is independent of the values of the other features present. We present three violations of this assumption, all arising from the influence of relations between features and of relations between relations . A sha...
متن کاملRelations and Equivalence Relations
In this section, we shall introduce a formal definition for the notion of a relation on a set. This is something we often take for granted in elementary algebra courses, but is a fundamental concept in mathematics i.e. the very notion of a function relies upon the definition of a relation. Following this, we shall discuss special types of relations on sets. 1. Binary Relations and Basic Definit...
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ژورنال
عنوان ژورنال: Science
سال: 1899
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.10.258.857