Nyomora, Agnes M. S.Brown, Patrick H.Pinney, K.Polito, V. S.2016-05-052016-05-052000Nyomora, A.M.S., Brown, P.H., Pinney, K. and Polito, V.S., 2000. Foliar application of boron to almond trees affects pollen quality. Journal of the American Society for Horticultural Science, 125(2), pp.265-270.http://hdl.handle.net/20.500.11810/1803The effect of boron (B) on in vivo and in vitro development of almond [Prunus dulcis (Mill.) D.A. Webb (syn. P. amygdalus Batsch)] pollen and pollen tubes and the resultant effect on fruit set was studied in mature trees. The cultivars Mono (pistil donor) and Butte (pollinizer) in an orchard with low soil B in Fresno, California were sprayed with B at 0, 0.8, 1.7, or 2.5 kg·ha–1 during Fall 1993. Pollen viability as indicated by the fluorescein diacetate method (FDA) was >85% and was not affected by field-applied B, however, in vivo pollen germination and tube growth were enhanced by foliar-applied B. More effect of applied B on in vivo growth appeared as pollen tubes progressed toward the ovary. For in vitro germination, foliar-applied B reduced bursting of tubes, and addition of B to the culture media significantly increased pollen germination and pollen tube growthenPrunus dulcisPollinationFfertilizationPollen germinationJournal Article, Peer Reviewed