How Do You Spell EXINTINE?
Pronunciation: [ɛɡzˈɪntiːn] (IPA) 
Correct spelling for the English word "Exintine" is [ɛɡzˈɪntiːn], [ɛɡzˈɪntiːn], [ɛ_ɡ_z_ˈɪ_n_t_iː_n] (IPA phonetic alphabet).
Pronunciation: [ɛɡzˈɪntiːn] (IPA)
Correct spelling for the English word "Exintine" is [ɛɡzˈɪntiːn], [ɛɡzˈɪntiːn], [ɛ_ɡ_z_ˈɪ_n_t_iː_n] (IPA phonetic alphabet).
Exintine is a term derived from linguistics that refers to the external surface coating found on the exine of the pollen grain. The exine is the outermost layer of the pollen grain, which acts as a protective covering for the male gametophyte in plants. The exintine, being the outer coating of the exine, serves several essential functions.
Firstly, Exintine provides mechanical protection to the fragile inner layers of the pollen grain, shielding it from physical damage and ensuring its integrity. This protective layer is particularly important for the survival of the male gametophyte during its dispersal from the anther to the stigma.
Secondly, exintine plays a crucial role in preventing desiccation by providing a waterproof barrier. This feature is vital for the long-distance transportation of pollen grains through various environmental conditions, as it helps to retain moisture within the gametophyte and maintain its viability.
Moreover, exintine serves as a defense mechanism against harmful agents such as ultraviolet radiation, toxins, or pathogens that might otherwise harm the pollen grain. It acts as a barrier against these external factors, enhancing the chance of successful fertilization.
Overall, the exintine is a protective and functional outer layer of the exine that plays a vital role in the survival and reproductive success of pollen grains. Its multifaceted functions encompass protecting the inner structures of the pollen, preventing dehydration, and offering defense against external threats.
In bot., one of the inner coverings of the pollen grain-see extine.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
