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Breakthrough : How salt stops plant growth

ScienceDaily (January 23, 2013)

Breakthrough : How salt stops plant growth

ScienceDaily (January 23, 2013)

Until now it has not been clear how salt, a scourge to agriculture, halts the growth of the plant-root system. Researcher found that not all types of roots are equally inhibited. They discovered that an inner layer of tissue in the branching roots is sensitive to salt and activates a stress hormone, which stops root growth. The study is a boon for understanding the stress response and for developing salt-resistant crops.

This is a confocal microscope image of a branching root (lateral root). The cell boundaries are in red and the the GFP fluorescent signal marks the endodermis.
(Credit : Image courtesy Jose Dinneny)

Salt accumulates in irrigated soils due to the evaporation of water, which leaves salt behind. The United Nations estimates that salinity affects crops on about 200 million acres (80 million hectares) of arable land and not just in developing countries, but areas such as California as well.

Story Source

The above story is based on materials provided by Carnegie Institution.

Pour en savoir plus (ScienceDaily)

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