Root hydrotropism is controlled via a cortex-specific growth mechanism

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...

Root gravitropism is regulated by a transient lateral auxin gradient controlled by a tipping-point mechanism.

Gravity profoundly influences plant growth and development. Plants respond to changes in orientation by using gravitropic responses to modify their growth. Cholodny and Went hypothesized over 80 years ago that plants bend in response to a gravity stimulus by generating a lateral gradient of a growth regulator at an organ's apex, later found to be auxin. Auxin regulates root growth by targeting ...

A mechanism for morphogen-controlled domain growth.

Many developmental systems are organised via the action of graded distributions of morphogens. In the Drosophila wing disc, for example, recent experimental evidence has shown that graded expression of the morphogen Dpp controls cell proliferation and hence disc growth. Our goal is to explore a simple model for regulation of wing growth via the Dpp gradient: we use a system of reaction-diffusio...

Three-Dimensional Modeling of Hydrotropism Effects on Plant Root Architecture along a Hillslope

sawa, 1994). However, all of these models have been developed for planar surfaces; none are for hillslopes. A three-dimensional model of root system development and soil Several studies have shown that plants growing along water flow is described and applied to actual conditions along a hillslope. In the model, gravitropism, hydrotropism, and circumnutation slopes have asymmetric root systems (...

Fed-batch Cultivation of Recombinant Escherichia coli Producing Human Interferon-γ Under Controlled Specific Growth Rate