Saturday, February 20, 2021

OPTIMIZATION OF WEED SEED DORMANCY BY CHEMICAL AND PHYSICAL TREATMENTS | PLANT CELL BIOTECHNOLOGY AND MOLECULAR BIOLOGY

A very significant ecological role is played by weed dormancy. It prevents the seeds from germinating as soon as possible and from being killed by unfavorable climatic conditions for their development. Dormancy is the outcome of a complex relationship between the genome and the agroclimatic factors encountered during their "reproductive and vegetative phase" by seed-bearing plants. Awareness of the time of emergence and the dynamics of the germination of weed seeds and the factors that affect them gives us an idea of the infestation of these weeds in agricultural areas, which would decrease the use of herbicides without affecting crop yields or the level of weed control. The results of seed germination tests and the emergence of dormancy of the following weeds are described in this paper: Phalaris brachystachys, Avena sterilis, Ridolfia segetum, Centaurea diluta, Cichorium endivia, Lolium rigidumn and Picris echioides, in which four methods were applied to seeds, a chemical treatment with the phytohormone giberelic acid (GA3), mechanica mechanica, in order to encourage germination. The results showed that mechanical and chemical scarification, with an average of 81.42 percent and 75.23 percent respectively, reported the highest germination percentages in our genus, whereas stratification (0 ° and 4 °) gave a low average of 62 percent and 67 percent . The findings found confirm with others that mechanical scarification and chemical treatment with gibberellic acid induces to a greater degree germination of the seeds examined. A physical dormancy caused by their teguments is thus exposed. This will allow farmers to use 0° and 4° stratification to block germination of seed weeds.


Please see the link :-
https://www.ikprress.org/index.php/PCBMB/article/view/5534

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