
The Comparative Effects of the Micro- and Macrosporogenesis of the Red Clover with Different Levels of Ploidy, in Relation with its Fertility
Author(s) -
Marioara Grebenișan,
M. Savatti
Publication year - 2011
Publication title -
bulletin of university of agricultural sciences and veterinary medicine cluj-napoca. agriculture
Language(s) - English
Resource type - Journals
eISSN - 1843-5386
pISSN - 1843-5246
DOI - 10.15835/buasvmcn-agr:6431
Subject(s) - red clover , pollen , biology , pollination , fertility , ploidy , botany , agronomy , population , biochemistry , demography , sociology , gene
. In this paper the di- and tetraploid red clover seedlings will be compared, under the aspects of micro and macrosporogenesys regarding his fertility. After a vast amount of research, the results obtained were that, often, the low seed yield in di- and tetraploid red clover is caused by fertility perturbance.One of the purpose of the experiments during the years 2004-2006, was to determine the low fertility effects and to offer important clues about di- and tetraploid red clover seed production. Red clover is a typical allogamous plant in which the autincompatibility system determined by the S alleles is very strong. The pollination is compulsorily done by honey and bumble bees, so the pollination mechanisms are being considerate as carrier of sexual differentiation, marked by microsporogenesys and macrosporogenesys, structural modification of flowers, pollen dispersion ecology and structural and physiological barriers as a reaction to fecundation process.