Responses of Bougainvillea to Salt Stress

长期盐胁迫处理实验表明,随着nA Cl浓度增加,不同三角梅品种的地上部和地下部生物量均呈下降趋势。与对照相比,盐浓度为5%时,勤花三角梅生物量下降幅度最小,为27.94%;樱花三角梅下降最大,为67.03%。当盐浓度为4%时,樱花三角梅、白苞三角梅和勤花三角梅的光量子产量分别为0.36、0.30和0.36,分别为对照的78.23%、79.64%和74.82%;金心鸳鸯三角梅的光量子产量为0.05,仅为对照的15.53%。白苞三角梅的光化学猝灭系数Q P值随着盐浓度的升高无明显变化;金心鸳鸯三角梅、勤花三角梅和樱花三角梅的Q P值随着盐浓度的升高而降低。4个三角梅品种的抗盐胁迫能力为:白苞三角梅>樱花三角梅>勤花三角梅>金心鸳鸯三角梅。The long-term Na Cl salt stress experiments showed that with the increasing of Na Cl concentration, shoot and root biomass of different Bougainvillea cultivars were decreased.At 5% Na Cl concentration, biomass of ‘Miss Manila' had the least decline of 27.94%; however, ‘Imperial Delight' had the largest decline of 67.03%, compared with the control.When the Na Cl concentration was 4%, the quantum yield of ‘Imperial Delight', ‘Shubhra' and ‘Miss Manila' were 0.36, 0.30 and 0.36, with 78.23%, 79.64% and 74.82% of the control, respectively; the quantum yield of ‘Thimma' was 0.05, only 15.53% of the control.With the increasing of Na Cl concentration, photochemical quenching coefficient q P of ‘Shubhra' had no obvious change; but q P value of ‘Thimma', ‘Miss Manila' and ‘Imperial Delight' decreased significantly.The resistance ability to Na Cl salt stress of four Bougainvillea cultivars was ‘Shubhra' > ‘Imperial Delight'> ‘Miss Manila' > ‘Thimma'.厦门市科学技术局项目(3502Z20124013

Studies on Arbuscular Mycorrhiza infection to Mangrove Plants in Fujian

2010年5月和12月,对福建沿海3个红树林生长区(洛阳江、九龙江口、漳江口)的红树林植物丛枝菌根(AM)侵染状况进行研究。结果表明:(1)红树林生长区中6种植物根内均发现AMf侵染结构,其中桐花树、秋茄、鱼藤和芦苇的丛枝为AruM(疆南星)型;(2)6种植物的丛枝菌根侵染率差异较大,老鼠簕的侵染率最高,鱼藤最低;(3)桐花树和秋茄的丛枝菌根侵染率呈显著差异,而其在不同生长区之间无差异;(4)桐花树和秋茄的丛枝菌根侵染率在不同时间呈显著差异,而钝草的丛枝菌根侵染率在不同时间的差异不显著。To study the symbiosis between arbuscular mycorrhizal fungi(AMF) and mangrove plant species,102 root and soil samples from 6 plant species were collected in three main mangroves growth zone in Fujian,in May and December of 2010.The main results showed that:(1)AMF infection structures were mostly found in the form of curled and expanded intracellular hyphae,vesicles,which were commonly associated with all the mangrove species we investigated.'Arum-type' arbuscules were found in Parmentiera cerifera,Kandelia obovata,Derris trifoliata and Phragmites australis;(2)AM infection rate was different in mangrove plant species,with Acanthus ilicifolius the highest and Derris trifoliate the lowest;(3) There were significant differences of AM infection rate existing between Parmentiera cerifera and Kandelia obovata,but no difference among three sampling sites;(4) There were also significant differences of AM infection rate in different period in Parmentiera cerifera and Kandelia obovata,but no significant difference in Stenotaphrum helferi in different period.厦门市科技项目(3502Z20072010、3502Z20102004);厦门市园林植物园园长基金(BG201101)资

Studies on the Seed Ingredients and Characteristics of Bambusa multiplex cv. Alphonse-Karr

对小琴丝竹种子成分和特性进行了系统研究。结果表明:(1)小琴丝竹种子成分含量分别为可溶性蛋白40.694 Mg/g、可溶性糖14.670 MMOl/g、游离脯氨酸0.292 Mg/g、超氧化物歧化酶(SOd)164.522 u、过氧化物酶(POd)51.389 u/(g.MIn)、过氧化氢酶(CAT)19.947 Mg/g、丙二醛(MdA)0.064μMOl/g;(2)小琴丝竹的果实为颖果。带稃片种子细狭长圆形,长1.5~2.2 CM,直径2.0~3.0 MM,紫灰色;去稃片种子为细长椭圆形,长0.9~1.3 CM,直径1.6~2.8 MM,棕褐色;(3)小琴丝竹种子的净度为90.07%、千粒重46.000 g、含水量达16.7%;(4)种子发芽率试验表明:随着播种时间的推移或nACl溶液处理浓度的提高,种子发芽率急剧下降。厦门市科学技术局科研项目(编号:3502Z20102003);厦门市市政园林局科研项目“竹类植物在观赏园艺上的应用研究”(编号:YK-2000-02