We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Barium Toxicity Effects in Soybean Plants.
- Authors
Suwa, Ryuichi; Jayachandran, Krish; Nguyen Tran Nguyen; Boulenouar, Abdellah; Fujita, Kounosuke; Saneoka, Hirofumi
- Abstract
Barium (Ba)-induced phytotoxicity at 100, 1000, or 5000 μM Ba in soybean plants ( Glycine max) was investigated under hydroponic culture conditions. Soybean growth and leaf photosynthetic activity were significantly inhibited by all three levels of Ba treatments. In the case of photosynthetic activity, 5000 μM Ba treatment shutdown stomatal opening and perturbed carbon fixation metabolism and translocation. However, 100 and 1000 μM Ba treatments shut down stomatal opening and inhibited carbon fixation, but without perturbation of leaf carbon fixation-related metabolism. Potassium (K) absorption by soybean roots was also reduced in all three Ba treatments. This decreased K absorption reduced K localization at guard cells. Barium accumulation in guard cells also inhibited K transport from epidermal cells to guard cells. This lack of K in guard cells resulted in stomatal closure. As a result of inhibition of K transport into guard cells and stomatal shutdown, photosynthetic activity and plant productivity were inhibited. Our experiment indicates that Ba has phytotoxic effects on soybean plants by inhibiting photosynthesis.
- Subjects
BARIUM; SOYBEAN; EFFECT of chemicals on plants; METAL toxicology; BEANS; FORAGE plants
- Publication
Archives of Environmental Contamination & Toxicology, 2008, Vol 55, Issue 3, p397
- ISSN
0090-4341
- Publication type
Article
- DOI
10.1007/s00244-008-9132-7