Abstract
Arbuscular mycorrhizae fungi (AMF) plays an important role in plants’ response to environmental stress, and the main environmental stress encountered in grape production is high temperature stress. This study aims to inoculate Funneliformis mosseae (A type of AMF) on grapes and investigate their tolerance to high temperature stress after inoculation. The results showed that AMF could infect grape roots, and the mycorrhizal infection rate was 20.78%. After inoculation with AMF, the growth of grape plants was significantly better than that in the non-inoculation group. Compared with the uninoculated group, the net photosynthetic rate, transpiration rate and stomatal conductance were higher in the AMF group, and the intercellular CO2 concentration was lower. After high temperature treatment, there was no significant difference in the content of hydrogen peroxide (H2O2) in grape leaves between the two experimental groups at each time, and the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and other enzymes showed great differences, especially after high temperature treatment for 6 h. The activities of SOD, POD and CAT in AMF group were significantly higher than those in uninoculated group. The content of malondialdehyde (MDA) in grape leaves of the two experimental groups had no significant difference between 0 h and 3 h after high temperature treatment, and the MDA content in the AMF group was significantly lower than that in the uninoculated group after 6 h of high temperature treatment. The contents of soluble sugar and soluble protein in the AMF group were higher than those in the uninoculated group at all time periods, especially after 6 h of high temperature treatment. In addition, we found that VvHSP70, VvHSP17.9, VvGLOS1, VvHSFA2 genes all responded to high temperature stress, but there was no significant difference between the AMF group and the uninoculated group. It can be seen from the above that AMF can significantly enhance the adaptability of grape plants to high temperature stress by improving photosynthetic efficiency, antioxidant enzyme activity, soluble sugar and soluble protein content, and reduce Malondialdehyde (MDA) content, which provides guidance and theoretical basis for grape production.
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Claims 11
Claim · model-written summary
AMF infected grape roots at a rate of 20.78%.
Verbatim
e0“AMF could infect grape roots, and the mycorrhizal infection rate was 20.78%.”
Claim · model-written summary
Inoculated grape plants grew significantly better than uninoculated plants.
Verbatim
e0“After inoculation with AMF, the growth of grape plants was significantly better than that in the non-inoculation group.”
Claim · model-written summary
Net photosynthetic rate, transpiration and stomatal conductance were higher with AMF.
Verbatim
e0“Compared with the uninoculated group, the net photosynthetic rate, transpiration rate and stomatal conductance were higher in the AMF group”
t0“grape”
Claim · model-written summary
Intercellular CO2 concentration was lower with AMF.
Verbatim
e0“Compared with the uninoculated group, the net photosynthetic rate, transpiration rate and stomatal conductance were higher in the AMF group, and the intercellular CO2 concentration was lower.”
t0“Grape”
Claim · model-written summary
Leaf hydrogen peroxide did not differ significantly between groups after heat treatment.
Verbatim
e0“After high temperature treatment, there was no significant difference in the content of hydrogen peroxide (H2O2) in grape leaves between the two experimental groups at each time”
Claim · model-written summary
SOD, POD and CAT activities were significantly higher with AMF after heat treatment.
Verbatim
e0“The activities of SOD, POD and CAT in AMF group were significantly higher than those in uninoculated group.”
t0“Grape”
Claim · model-written summary
MDA did not differ significantly between groups at zero and three hours.
Verbatim
e0“The content of malondialdehyde (MDA) in grape leaves of the two experimental groups had no significant difference between 0 h and 3 h after high temperature treatment”
Claim · model-written summary
MDA was significantly lower with AMF after six hours of heat.
Verbatim
e0“the MDA content in the AMF group was significantly lower than that in the uninoculated group after 6 h of high temperature treatment.”
t0“Grape”
Claim · model-written summary
Soluble sugar and protein were higher with AMF at all times.
Verbatim
e0“The contents of soluble sugar and soluble protein in the AMF group were higher than those in the uninoculated group at all time periods, especially after 6 h of high temperature treatment.”
t0“Grape”
Claim · model-written summary
VvHSP70, VvHSP17.9, VvGLOS1 and VvHSFA2 responded to high temperature.
Not reportedDirection
Verbatim
e0“VvHSP70, VvHSP17.9, VvGLOS1, VvHSFA2 genes all responded to high temperature stress”
t0“Grape”
Claim · model-written summary
Those gene responses did not differ significantly between AMF and uninoculated groups.
Verbatim
e0“there was no significant difference between the AMF group and the uninoculated group.”
t0“Grape”
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