【摘要】 本研究以东山沿海沙地三年生高节竹（Phyllostachysprominens）为研究对象，测定不同季节高节竹叶片的叶绿素（Chl）、可溶性蛋白（SP）、可溶性糖（SS）、脯氨酸（Pro）、丙二醛（MDA）含量。探究各季节环境条件下高节竹叶片的生理指标差异，分析其在沿海沙地不同季节环境下的适应情况，为构建更为完善、丰富且经济价值更高的沿海防护林生态体系提供理论依据。研究结果表明：（1）叶绿素a(Chla)、叶绿素b(Chlb)含量随季节变化趋势一致，均在夏季达到最高，夏季总叶绿素含量分别较秋、冬、春季高24.54%、11.39%、21.2%。（2）冬季SP含量最高，夏季最低，冬季含量比春、夏、秋季分别高50.65%、131.42%、18.52%；夏季SS含量显著高于其他季节，分别比春、秋、冬季高269.83%、112.65%、99.93%;MDA含量从秋季到夏季逐渐降低，各季节间差异显著；Pro含量夏季最高，分别较春、秋、冬季高18.37%、44.06%、23.13%。（3）温度和降水量对可溶性糖、可溶性蛋白和丙二醛含量有显著影响。东山沿海地区温度与降水同期，各指标在温度（降水）最高时期与最低时期相比，可溶性糖含量增加99.93%，可溶性蛋白含量降低56.79%，丙二醛含量降低52.72%。综上所述，高节竹可以通过调节叶绿素含量，确保光合作用顺利进行，并通过调节渗透物质含量来适应季节变化，光合作用与渗透调节系统是高节竹适应逆境环境的关键机制之一。更多还原

【Abstract】 The three-year-old Phyllostachys prominens in the coastal sandy land of Dongshan was used to determine the contents of chlorophyll(Chl), soluble protein(SP), soluble sugar(SS), proline(Pro), and malondialdehyde(MDA) in the leaves in different seasons, and to explore the difference of physiological indexes of bamboo leaves under different seasonal environmental conditions, and analyze its adaptation in different seasonal environments in coastal sandy land,provide theoretical basis for constructing a more complete, abundant and economically valuable coastal shelter forest ecosystem. The chlorophyll a(Chla) and chlorophyll b(Chlb) had the same seasonal variation trend, and reached the highest content in summer. The total chlorophyll content in summer was 24.54%, 11.39% and 21.2% higher than that in autumn, winter and spring, respectively. The content of SP was the highest in winter and the lowest in summer. The content of SP in winter was 50.65%, 131.42% and 18.52% higher than that in spring, summer and autumn, respectively.The content of SS in summer was significantly higher than that in other seasons, which was 269.83%, 112.65% and 99.93% higher than that in spring, autumn and winter, respectively. The content of MDA decreased gradually from autumn to summer, and the difference between seasons was significant. The content of Pro was the highest in summer,which was 18.37%, 44.06% and 23.13% higher than that in spring, autumn and winter, respectively. Temperature and precipitation had significant effects on soluble sugar, soluble protein and malondialdehyde content. In the coastal area of Dongshan, during the same period of temperature and precipitation, compared with the highest and lowest periods of temperature(precipitation), the content of soluble sugar increased by 99.93%, the content of soluble protein decreased by 56.79%, and the content of malondialdehyde decreased by 52.72%. In summary, P. prominens ensures the smooth progress of photosynthesis by regulating chlorophyll content, and adapts to seasonal changes by regulating the content of osmotic substances. Photosynthesis and osmotic adjustment system are the key mechanisms for P. prominens to adapt to adversity environment.更多还原