ISSN:
1573-5060
Keywords:
Malus
;
apple
;
Pyrus
;
pear
;
double pollination
;
pollination interval
;
temperature
;
pioneer pollen
;
seed set first pollen
;
seed set second pollen
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Double pollinations of apple and pear may double the seed production, to which the second pollen can contribute 3 times as many seeds as the first (pioneer) pollen, when the interval between pollinations is long enough (48 h) at low (≃ 10°C) or short enough (7 h) at high (≃ 20°C) temperatures. With shorter or longer intervals, the contribution of the second pollen to seed production diminishes. The dominance of the second pollen was attributed to promotion by the first one, the second pollen probably being optimally stimulated when the tubes of the first have passed about 1/3rd of the style. It is concluded that the effectiveness of the pioneer pollen method to overcome incompatibility, depends on whether the interval between pollinations can be usefully adjusted to both the environmentally (temperature) and inherently determined rate of pollen tube growth of the species.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00042150
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