Flower petals have not only diverse macroscopic morphologies but are rich in microscopic surface patterns, which are crucial to their biological functions. Both experimental measurements and theoretical analysis are c...Flower petals have not only diverse macroscopic morphologies but are rich in microscopic surface patterns, which are crucial to their biological functions. Both experimental measurements and theoretical analysis are conducted to reveal the physical mechanisms underlying the formation of minute wrinkles on flower petals. Three representative flowers, daisy, kalanchoe blossfeldiana, and Eustoma grandiflorurn, are investigated as examples. A surface wrinkling model, incorporating the measured mechanical properties and growth ratio, is used to elucidate the difference in their surface morphologies. The mismatch between the anisotropic epidermal cell growth and the isotropic secretion of surficial wax is found to dictate the surface patterns.展开更多
The study of micromycetes infestation on flower buds, flower petals and seeds from 10 taxa of Rhododendron sp. was conducted during 2010-2012. Mycological analysis was comprised of 1,500 specimens of buds and petals a...The study of micromycetes infestation on flower buds, flower petals and seeds from 10 taxa of Rhododendron sp. was conducted during 2010-2012. Mycological analysis was comprised of 1,500 specimens of buds and petals and 500 seeds of Rhododendron sp.. It was shown that the necrosis and dieback of buds were caused by complex micromycetes （43 species）, with dominants Pestalotiopsis sydowiana, Alternaria alternata, Truncatella truncata and Epicoccum nigrum. Watery brown spots on the flower petals, resulting in the dieback of flowers, were caused by 38 species, including the most common P. sydowiana, A. alternata and Trichoderma viride. The seeds were contaminated by 18 species, and in addition to the above, the following species were associated： Oidiodendron tennuissimum, Davidiella macrocarpa and Phoma leveillei. The results of the mycological analysis confirmed the diversity spectrum of micromycetes species that inhabit the infested Rhododendron buds, flowers and seeds. The research revealed which taxa attracted the largest number of colonies and species of fungi.展开更多
基金Supports from the National Natural Science Foundation of China(11602027)the National Science Foundation for Post-doctoral Scientists of China(2016M600969)
文摘Flower petals have not only diverse macroscopic morphologies but are rich in microscopic surface patterns, which are crucial to their biological functions. Both experimental measurements and theoretical analysis are conducted to reveal the physical mechanisms underlying the formation of minute wrinkles on flower petals. Three representative flowers, daisy, kalanchoe blossfeldiana, and Eustoma grandiflorurn, are investigated as examples. A surface wrinkling model, incorporating the measured mechanical properties and growth ratio, is used to elucidate the difference in their surface morphologies. The mismatch between the anisotropic epidermal cell growth and the isotropic secretion of surficial wax is found to dictate the surface patterns.
文摘The study of micromycetes infestation on flower buds, flower petals and seeds from 10 taxa of Rhododendron sp. was conducted during 2010-2012. Mycological analysis was comprised of 1,500 specimens of buds and petals and 500 seeds of Rhododendron sp.. It was shown that the necrosis and dieback of buds were caused by complex micromycetes （43 species）, with dominants Pestalotiopsis sydowiana, Alternaria alternata, Truncatella truncata and Epicoccum nigrum. Watery brown spots on the flower petals, resulting in the dieback of flowers, were caused by 38 species, including the most common P. sydowiana, A. alternata and Trichoderma viride. The seeds were contaminated by 18 species, and in addition to the above, the following species were associated： Oidiodendron tennuissimum, Davidiella macrocarpa and Phoma leveillei. The results of the mycological analysis confirmed the diversity spectrum of micromycetes species that inhabit the infested Rhododendron buds, flowers and seeds. The research revealed which taxa attracted the largest number of colonies and species of fungi.
