This study focused on
different parameters attached to the drought resistance of Thuya inoculated by
an indigenous endomycorrhizal fungus. The mycorrhizal and non-mycorrhizal Thuya
plants were exhibited to two stages of water: the level of water stress and an
irrigation normal level. The results showed that controlled mycorrhization
significantly improves plant tolerance to water dryness. Our finding showed
that the inoculation with endomycorrhizal fungi had a negative effect on the
content of photosynthetic pigments. On the other hand, Arbuscular Mycorrhizal
Fungi (AMF) inoculation had a positive impact on the soluble sugar content,
which was higher in AMF plants (251.4 mg/g) than in non-AMF plants (222.53
mg/g). Furthermore, the build-up of proline was lower in mycorrhizal plants
(89.95 mg/g) than in non-mycorrhizal plants (194.71 mg/g). Also, the total
soluble protein content was higher in mycorrhizal plants (257.84 µg/g) than
non-mycorrhizal plants (225.49 μg/g) under water stress. These data clearly
show that inoculation with endomycorrhizal fungi has improved the drought
tolerance of Tetraclinis articulata plants, which could be a very interesting
solution to reduce the adverse effects caused by drought and subsequently
determine the success of the programs regeneration in Thuya forests.
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