Study on Difference in Aluminum Resistance of Barley, Wheat and Rye

通过溶液培养条件下大麦、小麦和黑麦幼苗的根系发育和根尖等小部分植株的铝浓度变化，探讨了大麦、小麦和黑麦耐铝性差异的可能机制，发现不同的根系发育模式和不同的铝处理反应存在较大差异。在铝胁迫下，黑麦次生根发育旺盛，而不是主根迅速衰退，次生根伸长和钝化的活力保持不变。在铝胁迫下，大麦根系停止伸长和分枝，根尖呈打结状。根尖、亚尖、中部和近端的铝浓度比较表明，新发育的黑麦根系特别是根尖的铝含量显著低于大麦和小麦，而老根之间没有显著差异。

Possible mechanism on difference in aluminum resistance of barley, wheat and rye was investigated through root development and aluminum concentration in root tips and some other small portion of the seedling plants under solution culture.Major particular differences were found in different pattern of root development and different response to aluminum treatment. Rye was particular in vigorous development of secondary root in place of rapid decline of primary root and vigorousness of elongation and blunching of the secondary root was maintained under aluminum stress. On the contrary, the root of barley plant stopped elongation and branching under aluminum stress and the tips of root appeared knotting.Comparison of aluminum concentration in the root tips, sub-apical, middle, and proximal declared that newly developed root of rye showed significantly lower levels particularly in the tip than those of barley and wheat, and that old roots gave no significant differences among them.