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Published in Scientific Papers. Series B. Horticulture., Vol. LVII
Written by Maria IORDACHE, Lenuţa COROIANU

Pollen vitality as a biological feature is an important factor in the reproduction on amfimictic way and has major implications for the quantity and quality of fruit. In 2012, the negative effects upon the flowering buds that are produced in winter by climatic factors manifested by sudden thermal fluctuations with persistent frost and hard frost, without intermediate temperatures from a period to another have led to strong hurting of buds of fruit. Physiological disturbances due to the low temperatures have had a prolonged effect with repercussions in the microspores maturation, regarding the pollen viability and germinative capacity in some apricot tree. The object of the work is to evaluate the performance in germination %R(G/V) of the pollen, relationship expressed through germinal capacity and of mature pollen viability released from anthers that was affected by frost. There were evaluated microscopically the pollen vitality at apricot tree, hybrids: HB.82.62B.IV. and Nicusor cultivar with a different maturation period from the existing collection of SCDP Băneasa. As a result of the effectuated experiment there were obtained following values: the two biological indicators of mature pollen from apricot, the germinal capacity (G%), viability (V%) and their relation expressed by the performance in germination %R(R/V), on both sucrose environments (15% and 20%),have had values between 11%-33% for germinal capacity (G%), 25%-50% for viability (V% )and for efficiency in germination %R(G/V) between 44%-77% . In conclusion, leaders were the 826.62 hybrid and Nicusor cultivar.

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