期刊
SEXUAL PLANT REPRODUCTION
卷 13, 期 5, 页码 273-277出版社
SPRINGER
DOI: 10.1007/s004970100068
关键词
solanaceae; Lycium cestroides; breeding system; pollen tube growth; ovarian self-incompatibility; fruit quality; seed set
To determine the breeding system of Lycium cestroides, several treatments were performed: self-, cross-, and geitonogamous pollinations, autonomous self-pollination, and a control (flowers exposed to natural pollinators). Production and quality of fruits and seeds as well as pollen tube growth were evaluated for each treatment. Experimental pollinations indicate that L. cestroides is self-incompatible since fruits were obtained only under cross-, and open-pollination treatments. However, in self- and geitonogamous hand pollinations, as well as in autonomous self-pollination, pollen tubes developed successfully and reached the ovules. The speed of pollen tube growth did not differ significantly among the different hand-pollinated flowers (cross-, self-, and geitonogamous). These facts indicate the presence of an ovarian self-incompatibility system. Significant differences were observed in fruit set, fruit size, and seed number per fruit between cross-pollinated flowers and open pollination (control). These results could be explained in terms of quantity and quality of pollination in each case.
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