The area in which the female tassel could be pollinated with 100% was such a circular of 0.7 m radius, and the pollen density was 26 grain/cm2 in this limits. Besides, the area in which the female tassel could be pollinated with 90% ~ 99% was the circular of 0.7～1.7 m radius, and the pollen density was 23~26 grain/cm2 in this limits.
In the field plot tests, when chemicals sprayed at corn early tassel against the larvae of ACB, the effects of Larvae-killing Urea 3 13 or 20g (ai)/mu, Dimilin 2.5 or 5.0g (ai)/ mu and SIR8514 2.5 or 5.0g (ai)/ mu, were in reduction of damage stands 41.7, 58,3%;
The results showed as follow:1. The relative absorption of nitrogen amount in seeding stage, jointing stage, small bell mouth stage, big bell mouth stage, tassel emerge, filling stage, wax ripeness and complete ripeness were 1.85, 5.49, 22.26, 23.69, 16.24, 19.58, 7.17 and 3.73%, respectively.
The results suggest that the maize anther culture response may be influenced by environmental conditions that interact with ABA and GA treatments to donor plants during tassel development.
Production of ELS was significantly affected in certain environments when ABA, GA3, ancymidol, or fluridone solutions were pipetted into whorls of field-grown plants approximately 3 days before tassel harvest.
Micropropagation of the silk tassel bush,Garrya elliptica Dougl.
A single cultured tassel produces up to 200 normal spikelets which contain anthers bearing germinable pollen.
Northern hybridizations of mutant leaf, root, tassel, endosperm and embryo tissues with non-specific Sbe1b probes failed to reveal expression of the homologous sequence.