The effects on the MDA content in the leaves
Under different light intensities, the MDA content in the leaves of the
six mangrove species showed significant differences (P< 0.01; Figure 5). The MDA content in the leaves of theK. obovata , A. marina, and the R. stylosa seedlings
showed a gradually increasing trend, with the smallest low light stress
observed under the G1 treatment along with relatively low MDA values.
The MDA content in the leaves of the A. corniculatum , C.
tagal , and the B. sexangula seedlings first decreased and then
increased, with the least low light stress under the G2 treatment and a
relatively low MDA value. These results indicate that too high or too
low light intensity can increase the low light stress of seedlings and
thus increase the MDA content.
Under different flooding times, the MDA content in the leaves of the six
mangrove species all had significant differences (P <
0.01). The MDA content in the leaves of K. obovata , A.
marina , A. corniculatum , R. stylosa , C. tagal , and
the B. sexangula seedlings all first decreased and then
increased. The stress on the K. obovata , C. tagal , and theB. sexangula seedlings the was the lowest under the T2 treatment,
along with relatively low MDA values. The A. marina , A.
corniculatum , and the R. stylosa seedlings were under the lowest
stress under the T3 treatment, and their MDA content was also lower.
These results indicate that too long or too short flooding times can
increase the stress on the seedlings, resulting in an increasing MDA
content in the leaves.
Under different seawater salinities, the MDA content in the leaves of
the six mangrove species showed significant differences (P< 0.01). The MDA content in the leaves of the K.
obovata , C. tagal , and the B. sexangula seedlings all
showed a gradually increasing trend, with the lowest stress under the S1
treatment and lower MDA values. The MDA content in the leaves of theA. corniculatum , A. marina , and the R. stylosaseedlings first decreased and then increased; the seedlings showed the
lowest stress under the S2 treatment, and their MDA content was also
lower. These data indicate that too high or too low seawater salinity
can increase the stress on the seedlings, resulting in an increasing MDA
content in the leaves.