湖南农业大学植物激素重点实验室

湖南农业大学植物激素实验室是由湖南省教育厅和湖南农业大学共同资助的省级重点开放实验室，由全国留学回国人员先进个人、博士生导师、留美归国博士萧浪涛教授任主任。实验室现有液体闪烁仪、便携式光合作用测定系统、低温真空浓缩系统、高效液相色谱仪、植物激素免疫传感测定系统、PCR仪、扫描电镜和人工气候室等设备，总值600多万元。在植物激素与作物生长调控等方面具备较完善的研究条件。     

PV曲线压力室技术的改进

应用压力室进行植物PV曲线分析已在植物水分关系研究中很受重视,而且随着精密电子天平的应用,PV曲线测绘方     

湖南农业大学植物激素实验室

湖南农业大学植物激素实验室是由湖南省教育厅和湖南农业大学共同资助的省级重点开放实验室，由全国留学回国人员先进个人、博士生导师、留美归国博士萧浪涛教授任主任。实验室现有液体闪烁仪、便携式光合作用测定系统、低温真空浓缩系统、高效液相色谱仪，植物激素免疫传感测定系统、PCR仪、扫描电镜和人工气候室等设备，总值600多万元。在植物激素与作物生长调控等方面具备较完善的研究条件。     

中国梨室蜂科新种记述附已种族中检索素

本文记述中国梨室蜂科３新种，陕西三节梨室Ｒｕｎａｒｉａ ｓｈａｎｘｉｎｉｃａ Ｗｅｉ，ｓｐ．ｎｏｖ．；湖南三节梨室蜂Ｒｕｎａｒｉａ ｈｕｎａｎｎｉｃａＷｅｉ，ｓｐ．ｎｏｖ．刻盾三节梨室蜂Ｒｕｎａｒｉａ ｐｕｎｔａｔａＷｅｉ，ｓｐ．ｎｏｖ．。并确定１个属级新异名；Ｒｕｎａｒｉａ Ｍａｌａｉｓｅ１９３１＝ＢｏｈｅａＭａａ １９４４ｓｙｎ．ｎｏｖ．和１个新组合；Ｒｕｎａｒｉａ ａｂｒｕｐｔａ（ｍａａ），     

武夷山不同海拔阔叶树叶片养分含量及再吸收效率

为揭示亚热带山地阔叶树叶片养分利用策略随海拔梯度的变化规律，本研究选取武夷山不同海拔(1400、1600和1800 m)44种阔叶树，研究成熟与衰老叶片养分含量、化学计量比及养分再吸收效率，并分析其异速生长关系。结果表明：成熟叶片氮(N)、磷(P)含量显著高于衰老叶，且均随海拔升高而升高。磷再吸收效率(PRE)与氮再吸收效率(NRE)的平均值分别为48.3%和34.9%,PRE显著高于NRE,养分再吸收效率随海拔变化无显著差异。NRE与成熟叶N含量在低海拔处(1400 m)呈正等速生长，与衰老叶N含量在高海拔处(1800 m)呈负异速生长。PRE与衰老叶片N、P含量在低海拔(1400 m处)呈负等速生长，在高海拔处(1600、1800 m)呈负异速生长。各海拔PRE-NRE异速生长指数为0.95。随着海拔的升高，成熟和衰老叶片养分含量升高，但海拔不影响养分再吸收效率，且植物偏好从衰老叶中再吸收P,高海拔养分再吸收效率会影响衰老叶片的养分状况。     

Biomass allocation patterns of Loropetalum chinense

Aims Biomass is the most fundamental quantitative character of an ecosystem. Biomass allocation patterns reflect the strategies of plants to adapt various habitat conditions and play a vital role in evolution, biodiversity conservation and global carbon cycle. Loropetalum chinense shrub is one of the most dominant shrub types in subtropical China. The objectives of this study were to quantify the allometric relationships and the biomass allocation pattern among organs, and to investigate the effects of body size, shrub regeneration origin and site factors on allometry and biomass allocation.
Methods Individual samples of L. chinense were harvested from shrublands in subtropical China and were further divided into leaves, stems and roots. The allometric relationships between different organs were modeled with standard major axis (SMA) regression and the biomass allocation to different organs was quantified. The effects of body size, shrub regeneration origin and other habitat factors on allometry and allocation were examined using Pearson’s correlation analysis and multiple linear regressions.
Important findings The isometric scaling relationships between shoot and root changed to allometric relationships with increasing basal diameter. The scaling relationships between leaf and stem and between leaf and root were isometric for smaller diameter classes, while for larger diameter classes they were allometric. These relationships were significantly different among shrub regeneration origin types. The scaling relationships between different organs were not affected by habitat factors; while the coverage of shrub layer and slope affected biomass allocation due to their influences on the allometric relationships between different organs at the initial stage of growth. The mean dry mass ratios of leaf, stem, root and the mean root to shoot ratio were 0.11, 0.55, 0.34 and 0.65, respectively. With the increase of basal diameter class, stem mass ratio (0.50-0.64) increased, while leaf mass ratio (0.12-0.08) and root mass ratio (0.38-0.28) decreased, and consequently root to shoot ratio (0.91-0.43) also decreased. In secondary shrublands, the leaf mass ratio was 0.12 and the root mass ratio was 0.33, while these values were 0.07 and 0.36 respectively in natural shrublands. The ratio of aboveground allocation was significantly correlated to shrub layer coverage (r = 0.44, p < 0.05). Leaf mass ratio was significantly correlated to slope (r = -0.36, p < 0.05) and root mass ratio was significantly correlated to mean annual temperature (r = 0.34, p < 0.05). Results showed that with the increase of body size, the scaling relationships between different organs of L. chinense changed from isometric to allometric, and more biomass was allocated to aboveground part, and concretely, to stems. Human disturbance affected biomass allocation by its influences on the allometric relationships between different organs, and by increasing biomass allocation to leaves and decreasing allocation to roots. Reduced light resource promoted the biomass allocation to aboveground part, and higher slope resulted in decreased biomass allocation to leaves, while higher mean annual temperature promoted biomass allocation to roots. The variation in annual precipitation had no significant influences on biomass allocation. The biomass allocation strategies of L. chinense partially support the optimal partitioning theory.