منابع مشابه
Root-System Development and Water-Extraction Model Considering Hydrotropism
certain conditions. However, because root-system development is not considered in these water-extraction A two-dimensional model that combines root-system development models, the root length per unit soil volume should be and water extraction by roots is proposed to simulate the dynamic interaction between root growth and soil-water flow. Both of hydrotrogiven a priori as a function of soil dep...
متن کاملA gene essential for hydrotropism in roots.
Roots display hydrotropism in response to moisture gradients, which is thought to be important for controlling their growth orientation, obtaining water, and establishing their stand in the terrestrial environment. However, the molecular mechanism underlying hydrotropism remains unknown. Here, we report that roots of the Arabidopsis mutant mizu-kussei1 (miz1), which are impaired in hydrotropism...
متن کاملMIZ1-regulated hydrotropism functions in the growth and survival of Arabidopsis thaliana under natural conditions.
BACKGROUND AND AIMS Root hydrotropism is a response to water-potential gradients that makes roots bend towards areas of higher water potential. The gene MIZU-KUSSEI1 (MIZ1) that is essential for hydrotropism in Arabidopsis roots has previously been identified. However, the role of root hydrotropism in plant growth and survival under natural conditions has not yet been proven. This study assesse...
متن کاملThe Water Circuit of the Plants - Do Plants have Hearts ?
There is a correspondence between the circulation of blood in all higher animals and the circulation of sap in all higher plants-up to heights h of < ∼ 140 m-through the xylem and phloem vessels. Plants suck in water from the soil, osmotically through the roothair zone, and subsequently lift it osmotically again, and by capillary suction (via their buds, leaves, and fruits) into their crowns. I...
متن کاملCohesion of Water in Plants.
Forces applied tlhrough the cohesion of wvater have been generally accepte(d as the cause of the rise of the transpirationi streaml since the early publications of Dixon and( Joly (8). The water absorbing forces of the leaf mlesophyll cells caln be shown to be adequate to lift w!ater to the height of the leaves. The cohesion theorv assumiies that the (liffusion of water from the non-collapsible...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2007
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.0700846104