Studies On The Effects Of Some Mineral And Organic Substances On Pollen Germination
2006
Darvish, M., MSc in Plant Science, Payam Noor University, Tehran, Iran, | Ghanati, F., Department of Plant Science, | Bakhshi Khaniki, Gh., Department of Biology. Payam
Since pollen grain as a male gametophyte contains the heredity information, improved understandings on it's structure and somatic performance leads to identify the phenomena which are important in flowering plants reproduction ،and therby it is possible to obstruct from disturbances resulted from defective performance of pollen. Pollen grain simply germinates in a medium containg sucrose, boron and calcium ,therefore, can be easily selected as a suitable model cell for developmental biological studies. In the present study the effects of certain minerals and organic substances on pollen germination and pollen tube elongation of 3 plant species i.e., Camellia sinensis, Eustoma grandiflorum and Lagerstroemia indica were investigated. In view of genetic and physiological structure of each pollen type, the results were, to some extend, different, but similarities in the performance and response of pollens to the media, were in the line with the findings of other researches. Osmotic and metabolic importance of sucrose for pollen , was observed in all species. The regulatory and effective role of boron in germination of pollen was remarkable. Calcuim also showed a fundamental role in elongation of pollen tube. The viramins related to group B as well as linoleic acid and oxaloacetic acid had inhibatory and reductive effects on pollen germination. Fatty acids with saturated long chains had stimulatory effects on pollen germination and elongation of pollen tube.
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