Preliminary report on north-ward introduction experiment of several mangrove plants along the southern coast of Zhejiang Province.

TLDR: The comprehensive analyses showed that Sonneratia apetala,Aegiceras corniculatum,Excoecaria agallocha and Kandelia candel could safely survive the winter in the south part of Zhejiang Province,while the adaptability of other mangrove tree species to the studied area should be further experimented.

Abstract: To screen out the introduced mangrove species adaptive to the natural conditions in Wenzhou area,different provenances of mangrove species were experimented with and the annual growth of the experiment plots was investigatedThe results showed that survival rate of Kandelia candel,Sonneratia apetala,Aegiceras corniculatum and Excoecaria agallocha was 77%,73%,70% and 15% respectively,indicating the former 3 species could overwinter safely in the studied areaWhereas all the saplings of Laguncularia racemosa,Bruguiera gymnorhiza,Bruguiera sexangula varrhynchopetala,Rhizophora stylosa,Acanthus ilicifolius and Avicennia marina died in the winterCompared to the values measured in the summer,the increment amplitude of relative conductivity(RC) value of the tested species at 0℃ temperature was in the order that of Laguncularia racemosa Sonneratia apetala Aegiceras corniculatum one-year-old Kandelia candel eight-year-old Kandelia candelThe maximum increase of superoxide dismutase(SOD) value happened to Aegiceras corniculatum whose value measured at 0℃ increased by 105% compared to that of measured in the summerWhile the SOD values of Kandelia candel and Laguncularia racemosa did not change much with the seasonsThe proline(PRO) content in the leaves of Laguncularia racemosa in the winter increased by 2854% compared to the summer value,but there was very little change in this index for Sonneratia apetala and eight-year-old Kandelia candel along the seasonal changeThe comprehensive analyses showed that Sonneratia apetala,Aegiceras corniculatum,Excoecaria agallocha and Kandelia candel could safely survive the winter in the south part of Zhejiang Province,while the adaptability of other mangrove tree species to the studied area should be further experimented