Changes of Ca~(2+) distribution in root apical meristematic cells of wheat under aluminum stress
铝胁迫下小麦根尖分生细胞中Ca~(2+)分布变化

Changes of Ca 2 distribution in root apical meristematic cells of wheat under aluminum stress were observed with electron microscopic cytochemical method. When the roots grew in non aluminum environment, it was shown that the calcium antimonates distributed in cytoplasm, nucleus and intercellular spaces, especially in the vacuoles of cytoplasm. When the roots grew in aluminum stressed environment, the number of calcium antimonate in cytoplasm and nucleus decreased, and its distribution changed significantly. Moreover, the number of vacuole increased, but there were few calcium antimonates in vacuoles. This results indicated that not only did aluminum inhibite the uptake of Ca 2 by root cells, but also resulted in the changes of Ca 2 distribution. Aluminum could disturb cellular metabolism by disrupting Ca 2 homeostasis and affect the growth of roots.