Most fungal species Chaetomium aureum Chivers and Papulaspora byssina Hosson are associated with Cypripedium flavum Hunt et Summmerh.They are confined to Xianggelila County of Yunnan alpine areas,3 400-3 600?m.alt.Bub...Most fungal species Chaetomium aureum Chivers and Papulaspora byssina Hosson are associated with Cypripedium flavum Hunt et Summmerh.They are confined to Xianggelila County of Yunnan alpine areas,3 400-3 600?m.alt.Bubils of the genus Papulaspora (anamorph) are seem as produced by apothecial fungus as Chaetomium (teleomorph).It is interesting to speculate as to a possible perfact state for those fungi.展开更多
With the development of the multicellular nodules in the leaves of Hypericum per plastids increased both in number and volume, and some plastids degenerated and were surrounded by dark tubular elements and vesicles. S...With the development of the multicellular nodules in the leaves of Hypericum per plastids increased both in number and volume, and some plastids degenerated and were surrounded by dark tubular elements and vesicles. Some vesicles fused with vacuoles and secreted substances into vacuoles. There are many multivesicles, multimembrane structures and osmiophilic droplets in vacuoles of nodule cells. Meanwhile, dictyosome secreted vesicles into the vacuoles. However, there is a large central vacuole completely filled with secretory materials (hypericin) in matured multicellular nodules. This suggests that the osmiophilic droplets may be a precursor of hypericin originated from the degenerated plastids. There were abundant endoplasmic reticulums and dictyosomes between the plastids and osmiophilic droplets, suggesting that they may be involved in the synthesis and/or transport of the precursor of hypericin.展开更多
Previous studies demonstrated that cryptochromes are involved in blue light-induced coiling and prehaustoria development in young de-etiolated dodder seedlings. In this study, we suggest that carotenoids and chlorophy...Previous studies demonstrated that cryptochromes are involved in blue light-induced coiling and prehaustoria development in young de-etiolated dodder seedlings. In this study, we suggest that carotenoids and chlorophyll are not the blue light absorbing chromophores involved in the mediation of prehaustoria development to blue light. Norflurazon-bleached dodder segments coiled and formed prehaustoria under blue light. However, norflurazon significantly reduced prehaustoria number （62%） under a mixture of red and far-red light, suggesting that phytochromes could be altered by norflurazon.展开更多
文摘Most fungal species Chaetomium aureum Chivers and Papulaspora byssina Hosson are associated with Cypripedium flavum Hunt et Summmerh.They are confined to Xianggelila County of Yunnan alpine areas,3 400-3 600?m.alt.Bubils of the genus Papulaspora (anamorph) are seem as produced by apothecial fungus as Chaetomium (teleomorph).It is interesting to speculate as to a possible perfact state for those fungi.
文摘With the development of the multicellular nodules in the leaves of Hypericum per plastids increased both in number and volume, and some plastids degenerated and were surrounded by dark tubular elements and vesicles. Some vesicles fused with vacuoles and secreted substances into vacuoles. There are many multivesicles, multimembrane structures and osmiophilic droplets in vacuoles of nodule cells. Meanwhile, dictyosome secreted vesicles into the vacuoles. However, there is a large central vacuole completely filled with secretory materials (hypericin) in matured multicellular nodules. This suggests that the osmiophilic droplets may be a precursor of hypericin originated from the degenerated plastids. There were abundant endoplasmic reticulums and dictyosomes between the plastids and osmiophilic droplets, suggesting that they may be involved in the synthesis and/or transport of the precursor of hypericin.
文摘Previous studies demonstrated that cryptochromes are involved in blue light-induced coiling and prehaustoria development in young de-etiolated dodder seedlings. In this study, we suggest that carotenoids and chlorophyll are not the blue light absorbing chromophores involved in the mediation of prehaustoria development to blue light. Norflurazon-bleached dodder segments coiled and formed prehaustoria under blue light. However, norflurazon significantly reduced prehaustoria number （62%） under a mixture of red and far-red light, suggesting that phytochromes could be altered by norflurazon.
