Autecological Study on L. serriola, Astraceae- Egypt. | ||
| Mansoura Journal of Biology | ||
| Volume 45, Issue 4, December 2019, Pages 46-53 PDF (1.27 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/mjb.2019.462682 | ||
| Authors | ||
| M. E. Abu Ziada* 1; Mustafa M. El-Zayat2; Y. A. Obaid3 | ||
| 1Botany Department, Faculty of Science, Mansoura University, Mansoura, Egypt | ||
| 2Unit of Genetic Engineering and Biotechnology, Mansoura University | ||
| 3Botany Department, Faculty of Education, Dep. Bio. Al-Anbar University, Iraq | ||
| Abstract | ||
| Lactuca serriola L. is an annual species belongs to one of the largest plant families, Asteraceae. This plant is characterised by broad variation of different features. The present study was undertaken to explore the botanical aspects of Lactuca serriola including macro- and micro-morphology, karyotype, taxonomy, seed germination and salinity tolerance of plant seedlings. Lactuca serriola showed detail macro- and micro-morphological characters. Somatic set of chromosomes of L. serriola showed 18 chromosomes that were classified into metacentric and submetacentric chromosomes. The results illustrated that the plant could not withstand high degrees of salinity and L. serriola is not a salt tolerant plant. The successful germination of seeds has been attained only at 0.5% of NaCl solution while as the salinity increased the rate of germination of the seeds decreased. The optimum germination temperature is 300C and any variation away from this temperature sloping down the seed germination. Seeds germination of L. serriola cannot withstand soil water stress. It needs enough amount of water in soil to grow normally. This may explain its flourishing and its dense growth on or near the canal banks. The best germination obtained for the seed planted near soil surface whereas the depth increased, the germination decreased. The control seedlings irrigated with fresh water showed the relatively highest growth rate of fresh and dry weight. The successive increase in NaCl concentration in the solutions added were associated with successive decrease in the vegetative yields of L. serriola seedlings. | ||
| Keywords | ||
| L. serriola; micromorphology; Karyotype; germination; salinity | ||
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