Efeitos da baixa temperatura no tecido microsporogênico

Autores/as

  • C Shimoya UREMG

Palabras clave:

temperatura baixa, tecido microsporogênico, anomalias cariocinéticas, divisão celular, choque térmico

Resumen

The sudden changings in temperature, either natural or artificial, provoke anomalies in the microsporogenic tissue coming out. Depending upon the physiological state of the tissue and intensity of the changing temperature they show cytomyxi.

The kariokinetic anomalies are frequent in the microsporogenic tissues and meristems. They are found therefore in the tissues having great physiology multiplication, that is where there Will be larger number of pointed kariokinesis. Thus, they give us the idea that the “theory of mitogenetic radiations” and “hormones of division” have some relation with the appointed phenomenons.

Citas

Bowden, W. M. Diploidy, polyploidy, and winter hardiness relationships in the Flowering Plants. American Journal of Botany. Vol. 27: 357-370, June 1940.

Ortiz — Picon, J. M. Citologia General Editorial Labor, S. A. Barcelona - Madrid - Buenos Aires - Rio de Janeiro. 1947.

Pao, W. K. and W. H. Li. Desynapsis and other abnormalities induced by high temperature Jour. Genetics, 48 (3) : 297-310, 1948. (Resumo do “Biological Abstracts” vol. 22)

Shimoya, C. Anomalias observadas em microsporogénese de algumas espécies do gênero Ophrys. Ceres, 9 (51) : 167-188. 1953.

a Idem. Uma ligeira observação em células-mães dos grãos de pólen de Alstroemeria inodora Herb., tratada com 8-oxiquinolina e com temperatura Ceres, 9 (54) : 444-451. 1956.

b Idem. Anomalias meióticas em Lilium candidum L. atribuidas às mudanças de temperatura atmosférica. Ceres, 9 (5: 4436)-44 3. 1956.

Segenaga, M. Experimental studies of abnormal nuclear and cell divisions. IV. Observations with living cells of the effects of high and low temperature. Citologia, 14 (3/4) : 122-134. 1949. (Resumo do “Biological Abstracts” vel. 24).

Descargas

Publicado

2024-12-05

Cómo citar

Shimoya, C. (2024). Efeitos da baixa temperatura no tecido microsporogênico. Revista Ceres, 10(58), 224–230. Recuperado a partir de https://ojs.ceres.ufv.br/ceres/article/view/6363

Número

Sección

ARTICLE