Effects of aluminum, calcium, and phosphate on shoot growth, viability, and aluminum distribution in the root apices in highbush blueberry cultured in vitro
A. Suzuki et al., Effects of aluminum, calcium, and phosphate on shoot growth, viability, and aluminum distribution in the root apices in highbush blueberry cultured in vitro, J JPN S HOR, 68(5), 1999, pp. 937-941
Citations number
15
Categorie Soggetti
Plant Sciences
Journal title
JOURNAL OF THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE
The viability, Al distribution in root apices, shoot growth, and excreted o
rganic acid contents in blueberry cultured in vitro were examined to study
the effects of aluminum (Al), calcium (Ca), and phosphate (P) ions on the p
lant's tolerance to Al.
1. Roots in the control, exposed to an Al-free acetate buffer were signific
antly damaged, bur roots treated with 1mM Al or 1mM Al plus ImM Ca retained
their viability.
2. Al could not be detected in the root apex in the control, but the roots
treated with 1mM Al and 1mM Al+Ca accumulated Al in the cortical area but n
ot to the interior cortex as the treatment progressed. Thus, the accumulati
on of Al on the root surface seems to have protected the plant from the dam
age of low pH and acetate ions.
3. 1 mM Al in the medium hastened both the shoot and root growth for fifty
days. The elimination of P from the medium inhibited root growth more than
shoot growth.
4. The amount of organic acids excreted did not differ whether Al was prese
nt or nor indicating that 1mM Al is not injurious.