Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

2 Acta Biologica Cracoviensia. Series Botanica

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

The effect of carbohydrates and polyethylene glycol on somatic embryo maturation in hybrid fir Abies alba x Abies numidica

100%

Salaj T. , Matusova R. , Salaj J.

Acta Biologica Cracoviensia. Series Botanica

2004

tom 46

159-167

Embryogenic cell line AN 72 derived from immature hybrid fir Abies alba x A. numidica zygotic embryos was subjected to different maturation treatments. The effect of the carbohydrates sucrose, maltose and glucose (each at 3%, 6% and 9%) or PEG-4000 (5.0%, 7.5% and 10%) combined with different carbohydrate sources was tested. PEG-4000 stimulated somatic embryo maturation of hybrid fir. This stimulatory effect was dependent on the carbohydrate source used. Culture medium with maltose as carbohydrate source combined with PEG-4000 produced the highest number of cotyledonary somatic embryos. Carbohydrates supplied alone (mainly at 6% and 9%) exerted an unfavorable effect, increasing the frequency of abnormally shaped somatic embryos without regeneration capacity. The structural organization of morphologically well-developed cotyledonary somatic embryos was similar to that of zygotic embryos. In abnormal somatic embryos the shoot apical meristem and root meristem were very damaged. Electrophoretic separation of denatured proteins using SDS-PAGE showed differences in the accumulation of low molecular weight storage proteins in somatic embryos. Storage protein accumulation was dependent on the concentration of PEG-4000 and the carbohydrate source.

Biochemistry of zygotic and somatic embryogenesis in silver fir [Abies alba Mill.]

100%

Kormutak A. , Salaj T. , Matusova R. , Vookova B.

Acta Biologica Cracoviensia. Series Botanica

2003

tom 45

nr 1

The paper reports a comparative study of storage protein synthesis and enzyme activity during zygotic and somatic embryogenesis of silver fir. The SDS-PAGE profiles of storage proteins in zygotic and somatic embryos were similar but not identical. Six storage protein fractions were detected in zygotic embryos, as compared with eleven fractions in somatic embryos. The principal storage protein of zygotic embryos was represented by the 43 kDa fraction, and in somatic embryos by the 53 kDa fraction. Peroxidase activity was lower in the precotyledonary and cotyledonary stages of somatic embryos than in the corresponding developmental stages of zygotic embryos. However, following desiccation, the mature somatic embryos possessed three times higher peroxidase activity than the mature zygotic embryos. The reverse was true of the specific activity of esterase, which was higher in zygotic embryos than in somatic embryos in all stages of development.