The endangered seagrass Halophila beccarii mainly grows in intertidal habitats with different salin-ity along the coast of the Indian Ocean-Pacific region.In order to explore the adaptation strategy of H.becca-rii under different salinity conditions,H.beccarii was took as the experimental object to study the effects of different salinity(salinity 0,10,20 and 30)on the growth adaptability of H.beccarii in an indoor controllable ecological flume.The results showed that:(1)When the salinity was 20,H.beccarii had the maximum leaf length,leaf width,and petiole length,and when the salinity was 10,it has the maximum growing end density and erect stem density.(2)Under moderate salinity(salinity 10 and 20),the leaf morphological parameters were positively correlated with the density of the growing end or the density of the erect stem,while under freshwater(salinity 0)or relatively high salinity(salinity 30),the leaf morphological parameters were nega-tively correlated with the density of the growing end or the density of the erect stem.(3)The results of prin-cipal component analysis showed that the salinity of 10 was beneficial for the growing end and erect stem of H.beccarii,while the salinity of 20 was beneficial to the growth of the leaves of H.beccarii.The results of this research are of great significance for a deeper understanding of the adaptation mechanism of H.beccarii to different salinities.
关键词
贝克喜盐草/盐度胁迫/叶片形态/直立茎密度/生长端密度
Key words
Halophila beccarii/salinity stress/leaf morphology/the density of growing end/the density erect stem
维普
万方数据