Rhizoeconomics: The Roots of Shoot Growth Limitations

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Grasses suppress shoot-borne roots to conserve water during drought.

Many important crops are members of the Poaceae family, which develop root systems characterized by a high degree of root initiation from the belowground basal nodes of the shoot, termed the crown. Although this postembryonic shoot-borne root system represents the major conduit for water uptake, little is known about the effect of water availability on its development. Here we demonstrate that ...

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Growth of Roots

The growth, development and function of plant roots in relation to plant productivity has been very difficult to evaluate, especially in natural field situations. Weaver (1926) and co-workers stated over 50 years ago that "An exact knowledge of the root development of crop plants, of their position, extent and activity as absorbers of water and solutes at various stages of growth is of paramoun...

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Food Reserves in Mountain Longleaf Pine Roots during Shoot Elongation

Survival and growth of longleaf pine seedlings depends upon a well-developed root system. Soil moisture is also critical for the seedling to emerge from the grass-stage. When longleaf pine seedlings emerge from the grass stage, they grow rapidly in height and diameter. Branches are often few in number and, if present, may have low photosynthesis rates. This growth pattern is seen on all longlea...

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Light requirement for shoot regeneration in horseradish hairy roots.

Hairy roots of horseradish (Armoracia rusticana) were induced by inoculation with Agrobacterium rhizogenes harboring Ri plasmid and cultured on phytohormone-free Murashige and Skoog medium after eliminating the bacteria. Hairy roots grew vigorously and sometimes formed yellowish calli under dark conditions. On the other hand, growth of hairy roots stopped after several weeks of culture with lig...

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ژورنال

عنوان ژورنال: HortScience

سال: 2007

ISSN: 0018-5345,2327-9834

DOI: 10.21273/hortsci.42.5.1107