The search towards cyto-embryological and physiological obstacles in sexual reproduction of Stevia rebaudiana Bertoni
| Autor: | Ewa Capecka, Krystyna Musiał, Michal Santocki, Monika Tuleja, Michał Dziurka, Marta Libik-Konieczny |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Steviol Horticulture Biology medicine.disease_cause 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Pollen Botany medicine gametophytogenesis steviol glycosides Gametophyte food and beverages gibberellin Sexual reproduction Stevia rebaudiana 030104 developmental biology chemistry Germination pollen Pollen tube Gibberellin sporogenesis 010606 plant biology & botany |
| Popis: | Seed germination in Stevia rebaudiana is poor and seedlings are difficult to achieve, thus the generative reproduction of this plant is limited. The aim of our studies was to investigate the stages of female and male gametophyte development along with pollen viability and pollen germination. Although our results showed the proper way of stevia male and female gametophyte development and a high viability of mature pollen grains, the lack of pollen tube formation followed by difficulties in seed development were still observed. We hypothesize that trouble with propagation of S. rebaudiana by seed might be caused by the unsuitable level of gibberellins (GAs) that are commonly recognized as signaling factors during the transition from the vegetative to the generative developmental phase. We found the decrease in the concentration of some GAs during plants flowering and we concluded that this might cause the inability of pollen tube germination. Moreover, S. rebaudiana plants exhibit a high concentration of steviol glycosides (SGs) that are synthesized in the biosynthetic pathway sharing some steps with the GAs formation. Therefore, the redirection of the metabolic pathway into secondary metabolites biosynthesis might be a reason for the failure in stevia pollen grains proper function. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|