ISHS Acta Horticulturae 403: International Symposium on Cultivar Improvement of Horticultural Crops. Part 2: Fruit Crops
STUDIES ON THE POLLEN MORPHOLOGY AND ULTRASTRUCTURE OF CULTIVATED VARIETIES OF APRICOT, ARMENIACA VULGARIS LAM. |
| Authors: | T. Dezhong, W. Baoming, D. Gaixiu, F. Xiaofeng |
| Keywords: | Apricot, Armeniaca vulgaris Lam, Pollen morphology, Scanning electron microscope, Exine ultrastructure |
| Abstract:
The apricot, Armeniaca vulgarisLam, is originally sources from the Huanghe valley in China, according to the data of investigation of apricot resources in shanxi province, there are about 300 varieties of apricot. In the past, because they are mostly propagation by the seedling, so bring about the varieties and strains too numerous and too complicated, actually, many of them are same name for different object or different name for same object. Up to date, still lack of standard research report for its taxonomy. In order to search the diagnostic characters of pollen morphology for taxonomy, in 1990, the pollen grains of 25 species or varieties [belonging to 2 genera and 4 species-Armeniaca vulgaris Lam., Armeniaca sibirica (L) Lam., Prunus davidian Carr., and Prunus salicina Lindl.] have been examined with the Scanning Electron Microscope (SEM). Upon the basis of which, in the present work, pollen grains of 78 cultivated varieties of apricot, Armeniaca vulgaris Lam. were examined under SEM. The observation shows that: 1. There are differences in size, shape and exine ornamentation of pollen grains in different varieties of apricot; 2. The smooth degree of exine of pollen grains are correlated significantly with the sweet or bitter taste of apricot kernel, generally, the smooth exine of pollen grains are correlated significantly with the sweet or bitter taste of apricot kernel, generally, the smooth exine of pollen grains there is a bitter taste kernel, and rough exine of pollen grains there is a sweet taste kernel; 3. The shape of pollen grains are mostly prolate and rarely obtuse-triangular (only in yellow fruit coat varieties); 4. The size of pollen grains of apricot are medium (51.378* 25.148–60.189um), the early ripening varieties there are a smaller P/E ratio and the medium-late ripening varieties there are a larger P/E ratio. | |
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