Germination rate and quality of pollen of different plum cultivars after cold storage.

摘要

The germination of plum pollen in vitro (cultivars Cacaks Fruhe, Cacaks Schone, Ortenauer, Stanley and Valjevka, grown in Germany) was used as a criterion to measure pollen quality. Some of the cultivars exhibited 20% germination whereas others exhibited up to 70% germination. Percentage germination was cultivar dependent over a wide range of pH. The typical germination percentage of cultivars did not decline during 3 weeks of storage in a refrigerator (4deg C) if complete flowers were stored; viability declined with longer periods of storage. Fresh plum pollen can be stored to enable pollination of late flowering cultivars with pollen from early flowering cultivars.