Self-incompatibility in Spanish clones of apricot (Prunus armeniaca L.) tree
The present study is about some aspects of the reproduction physiology of twenty apricot clones ( Prunus armeniaca L.) grown in Abarán (Murcia, Spain). Self incompatibility of these clones was determined not only in field conditions in terms of the fruit set by means of self fertilization and free pollination, but also in laboratory conditions, by means of fluorescence microscopy of pollen germination on the stigma and of the growth of the pollen tube towards the egg. The only clone with signs of self incompatibility was ‘Moniquí Azaraque’. The clone with the lowest fertilization time was ‘Chicanos Archena’.
Reproductive Behavior of Tunisian Apricot Cultivars as Related to Floral Morphometric Characteristics and Pollen Quality
Floral morphometric characteristics, pollen quality, and field pollinations were used to determine the reproductive behavior of 12 Tunisian apricot cultivars. A large variability was obtained between cultivars and among years. The interaction “cultivar × year” was highly significant for almost all of the floral morphometric characteristics. Three cultivar groups were identified according to their fruit set percentage obtained following passive self-pollination: Probably self-incompatible: ‘Oud Rhayem’, ‘Oud Hmida’, ‘Bouthani Ben Friha’, ‘Oueld El Oud’, ‘Ouardi’, and ‘Hamidi’; Probably self-compatible: ‘Bedri Ahmar’, ‘Asli’, ‘Bouk Ahmed’, and ‘Adedi Ahmar’; Self-compatible: ‘Sayeb’ and ‘Raki’.
Note on visual distinction of fluorescent callose of pollen tubes and of sieve tubes in stylar tissue ofBrassica and its allies
SummaryUsing Martin's fluorescence technique the sieve tubes of the styles in theBrassiceae sometimes look confusingly like pollen tubes, but the two can be distinguished by relatively easy observational criteria.