[Objective] The countermeasure on the number of fructification of Spartina alterniflora in the period of sexual reproduction and the component of seed yielding construction was explored.[Method] The Spartina altemiflo...[Objective] The countermeasure on the number of fructification of Spartina alterniflora in the period of sexual reproduction and the component of seed yielding construction was explored.[Method] The Spartina altemiflora in Mangroves conservation zone located at Hepu of Guangxi being taken as experimental material, its morphological and quantitative characteristics, as well as the weight of 100 full seeds at maturity stage in three different growth conditions（ clay, loam and sand） were studied. [ Results] The results showed that Spartina alterniflora had the best growth pattern in the loam. The morphological factors of fructification of S. altemiflora grown in sand were larger then in others. In the three growth conditions the order of quantitative characteristics of fructification of S. alterniflora was clay 〉 sand 〉 loam and the seeds in spikelet at top position were more maturity than those at the button position. [ Conclusion] In good condition, the Spartina altemiflora growth was vigor but the ratio of seed-setting was low.展开更多
The fructification of the noeggerathialean foliage Plagiozamites is very likely a cylindric strobilus based on close associations from the Early Permian Lower Shihhotse Formation of Weibei Coalfield in Shaanxi and Den...The fructification of the noeggerathialean foliage Plagiozamites is very likely a cylindric strobilus based on close associations from the Early Permian Lower Shihhotse Formation of Weibei Coalfield in Shaanxi and Dengfeng Coalfield in Henan. The strobilus is articulated. Sporophylls arise from the node, with the proximal parts slightly united and with a tight angle to the axis; distal parts upturned pointing upwards and nearly parallel to the axis, coveting the neighboring sporophylls of the next node. A sessile sporangium is situated at the adaxial side of each sporophyll. There are 12-16 sporangia and sporophylls in each node. This type of strobilus may have been identified as some sphenophyllalean/equisetalean cones in previous study.展开更多
The effects of GA3,6-BA,CEPA,PP333 and CCC were experimented on length and diameter of shoots,number of staminte and pistillate per shoot,length of spike and fleabane number of Castanea mollissima . The results ...The effects of GA3,6-BA,CEPA,PP333 and CCC were experimented on length and diameter of shoots,number of staminte and pistillate per shoot,length of spike and fleabane number of Castanea mollissima . The results showed that the number of pistillate was increased significantly by spraying GA3, 6-BA and PP333 and decreased by CEPA. The number of staminte was reduced by GA3 and CEPA(50 mg·L-1 treatment promoted). The vegetative growth was promoted by GA3,6-BA and CEPA and prevented by PP333 and CCC. The length of spike was restrained by GA3 and CEPA. The number of fleabane was promoted by GA3 and PP333 and prevented by CEPA. PP333 (500,1 000 mg·L-1 ) were optimal recipe for enhancing the number of female flowers and fleabane number.展开更多
基金Supported by the National Natural Science Foundation of China(30660036 )the Natural Science Foundation of Guangxi Province(0728096) Project of Graduate Student Education Innovation ofGuangxi (2008106020907M266)~~
文摘[Objective] The countermeasure on the number of fructification of Spartina alterniflora in the period of sexual reproduction and the component of seed yielding construction was explored.[Method] The Spartina altemiflora in Mangroves conservation zone located at Hepu of Guangxi being taken as experimental material, its morphological and quantitative characteristics, as well as the weight of 100 full seeds at maturity stage in three different growth conditions（ clay, loam and sand） were studied. [ Results] The results showed that Spartina alterniflora had the best growth pattern in the loam. The morphological factors of fructification of S. altemiflora grown in sand were larger then in others. In the three growth conditions the order of quantitative characteristics of fructification of S. alterniflora was clay 〉 sand 〉 loam and the seeds in spikelet at top position were more maturity than those at the button position. [ Conclusion] In good condition, the Spartina altemiflora growth was vigor but the ratio of seed-setting was low.
基金Project KZCX2-SW-105 of Chinese Academy of Sciencesthe National Natural Science Foundation of China (Nos.40572008 and40621062)the Major Basic Research Project of Ministry of Science and Technology of China(No.2006CB806400)
文摘The fructification of the noeggerathialean foliage Plagiozamites is very likely a cylindric strobilus based on close associations from the Early Permian Lower Shihhotse Formation of Weibei Coalfield in Shaanxi and Dengfeng Coalfield in Henan. The strobilus is articulated. Sporophylls arise from the node, with the proximal parts slightly united and with a tight angle to the axis; distal parts upturned pointing upwards and nearly parallel to the axis, coveting the neighboring sporophylls of the next node. A sessile sporangium is situated at the adaxial side of each sporophyll. There are 12-16 sporangia and sporophylls in each node. This type of strobilus may have been identified as some sphenophyllalean/equisetalean cones in previous study.
文摘The effects of GA3,6-BA,CEPA,PP333 and CCC were experimented on length and diameter of shoots,number of staminte and pistillate per shoot,length of spike and fleabane number of Castanea mollissima . The results showed that the number of pistillate was increased significantly by spraying GA3, 6-BA and PP333 and decreased by CEPA. The number of staminte was reduced by GA3 and CEPA(50 mg·L-1 treatment promoted). The vegetative growth was promoted by GA3,6-BA and CEPA and prevented by PP333 and CCC. The length of spike was restrained by GA3 and CEPA. The number of fleabane was promoted by GA3 and PP333 and prevented by CEPA. PP333 (500,1 000 mg·L-1 ) were optimal recipe for enhancing the number of female flowers and fleabane number.
