Assessment of the Respiratory Costs of Adaptation in Plant Species That Differ in Their Responses to Insufficient and Excessive Mineral Nutrition

Assessment of the Respiratory Costs of Adaptation in Plant Species That Differ in Their Responses... The effects of insufficient and excessive mineral nutrition on the relative growth rate (RGR); the rate of total dark respiration (ΣR); gross photosynthesis (Pg); and the contents of endogenous IAA, ABA, and cytokinins (CK) were studied in 20–60-day-old seedlings of plant species that differed in their responses to these factors: beet root (Amaranthus retroflexusL.), orchard-grass (Dactylis glomerataL.), and common wheat (Triticum aestivumL.). The changes in the level of mineral nutrition lowered the RGR and Pgvalues and the IAA/ABA and CK/ABA ratios and increased the ΣRand ΣR/Pgvalues and ABA content, especially in A. retroflexusand T. aestivum. The authors propose a new way to assess the respiratory cost of adaptation to stress based on the relation between the RGR and the ΣR/Pgvalues. The adaptation component of ΣRis shown to relate to the ABA content. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Assessment of the Respiratory Costs of Adaptation in Plant Species That Differ in Their Responses to Insufficient and Excessive Mineral Nutrition

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2001 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1023/A:1016768321554
Publisher site
See Article on Publisher Site

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