Wybrane zagadnienia z biologii trzech gatunków gloriozy
AbstractAn investigation composed of three parts was carried out in the period 1974-1987. The first part concerned the results of studying glorinsas in conditions of their natural occurence in Ghana, West Africa. Two species were localized: Gloriosa rothschildiana O'Brien, found in savannah woodland in northern Ghana, and Gloriosa superba L. in a narrow belt of costal scrubland in the south. Biometric measurements of plants and the evaluation of environmental conditions were carried out there. The collected samples of plants transported to Poland were subject to 2-year observatiuns in greenhouse conditions. The develop¬mental phases and parameters of the investigated plants were determined. In the second part of the investigation different factors affecting the germination of seeds of the two species mentioned above and of G. simplex L. were evaluated. The effect of temperature and light and its different sources was determined in laboratory conditions. The effects of the period of storage and of different methods in sca¬rifying seeds on their germination were also screened. The experiments confirmed the favourable influence of 12-hour daylength on the germi¬nation of G. rothschildiana. With the 12-hour daylength this process Was not modified by different intensities of artifical light. The same action of sodium, mercuric, and fluorescent lamps on germination was observed in the case of G. rothschildiana seeds while dysprosium lamps inhibited this process. The fleshy coat left on seeds of yloriosa very unfavourably affected their germination. Light inhibited the germina¬tion of G. simplex and G. superba. The optimum temperature for seed germination approximated 30°C in the case of G. simplex and to 20°C for G. superba. Different methods in scarification used in the case of most hardy seeds of G. superba were found inefficient, apart from a light application of abrasive paper, and increased the deyree of attack of fungal disease. The 16-week storage of G. simplex seeds did not change their germination ability and energy. With G. simplex and G. rothschildiana the percentage of germinated specimens was almost 100 % and with G. su¬perba did not exceed 52 %. The shortest period of germination, 9,7 days, was found in the case of G. simplex. With G. rothschildiana it amounted to 36 days, the longest one, B4 days, having been found with G, superba. In the third part of the study the content of colchicine in tubers was determined in the aspect of the value of the three investiga¬ted gloriosa species as a possible source of this alkaloid. Thin layer twn-dtmentional ascending chromatography was used in determinations. The identification of colchicine, the absorption spectra of separated stains, and the percentage dry matter content of colchicine were spectrophotometrically determined. The results showed a 0,362 % content of colchicine in dry matter of G. superba tubers. In the other two species it was reduced to nearly 1/5 of that value. Apart from doichicIM 8 other substances of the alkaloid type were found in the tubers 30 of them, like colchicine, being tropnlonc derivatives.
|Other language title versions||SELECTED PROBLEMS OF THE BIOLOGY OF 1HREE GLORIOSA SPECIES|
|Publisher||Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie, MNiSW |
|Publishing place (Publisher address)||Kraków|
|Book series /Journal (in case of Journal special issue)||Zeszyty Naukowe Akademii Rolniczej im. H. Kołłątaja w Krakowie. Rozprawy, ISSN 1233-4189, (0 pkt)|
|Publication size in sheets||2.5|
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