不同淡水水位对桐花树幼苗生理生态的影响  

Effect of Different Fresh Water-logging Levels on the Physio-ecological Characteristics of Aegiceras corniculatum Seedlings

作　　者：刁俊明[1] 陈桂珠[2] 

机构地区：[1]嘉应学院生命科学学院,广东梅州514015 [2]中山大学环境科学与工程学院,广州510275

出　　处：《中国农学通报》2013年第28期1-8,共8页Chinese Agricultural Science Bulletin

基　　金：广东省科技计划项目"红树植物桐花树治理城乡河涌污染的技术研究与应用"(2010B031900044)

摘　　要：为了探索红树植物在淡水淹浸胁迫下的响应机制,在广东梅州试验地用5个水位淡水种植红树植物桐花树(Aegiceras corniculatum)幼苗1年,研究不同淡水水位对桐花树幼苗生理生态的影响。5个水位梯度处理是:0、1/4、2/4、3/4、4/4水位。结果表明:0、1/4、2/4组幼苗的成活率、茎高、茎径、分枝数、叶片数、叶面积、根数、根长和根直径均显著高于3/4和4/4;茎高增量表现为:2/4>1/4>0>3/4>4/4,茎径增量表现为:1/4>2/4>0>3/4>4/4;0、1/4和2/4组幼苗的根、茎、叶的生物量、单株生物量均显著大于3/4和4/4组。幼苗叶片和根中的SOD和POD酶活性表现为当达到2/4淹水位时呈显著升高,且随淹水位加大而呈显著升高的趋势;叶绿素含量、根系活力和可溶性糖含量均表现为0、1/4、2/4与3/4、4/4之间存在显著差异,且随水位的升高呈下降趋势。其在3/4淹水位里淹浸270天仍生长良好,可知桐花树耐淹水能力较强。从桐花树的生理生态特性考虑,其适宜种植在淡水河流滩涂和湖泊及水库的消落带上,种植位置可以在最低水位线以上。In order to investigate the response of mangrove plant to fresh water logging stress, Aegiceras corniculatumseedlings were cultivated in fresh water in Meizhou, Guangdong for 1 year to investigate the effect of different fresh water-logging levels on their physio-ecological characteristics. The 5 water depths were：0, 1/4, 2/4, 3/4 and 4/4, respectively. Results showed that： the 0, 1/4 and 2/4 groups had significant higher survival rate, height, stem diameter, branch number, leaf number, leaf area, root number, root length and root diameter than those of the 3/4 and 4/4 groups;the height increase showed a trend of 2/4〉1/4〉0〉3/4〉4/4, and the stem diameter increased a trend of 1/4〉2/4〉0〉3/4〉4/4;the biomass of the 0, 1/4 and 2/4 groups also were significantly higher than those of the 3/4 and 4/4 groups; SOD and POD activities in leaf and root increased significantly as water depth reached 2/4 and higher;the chlorophyll content, root activity and soluble sugar of the 0, 1/4 and 2/4 groups were significantly higher than those of the 3/4 and 4/4 groups, with a trend of decreasing with water depth;the seedlings of Aegicerascorniculatumgrew well at 3/4 water depth for 270 days, indicating a strong water logging tolerance. The physio-ecological characteristics revealed by this study indicated that Aegicerascorniculatumwas suitable for cultivation in shallows of rivers, lakes or reservoirs.

关 键 词：桐花树幼苗 淡水水位 淹浸胁迫 生理生态 

分 类 号：Q945.1[生物学—植物学]