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Increased resistance to a generalist herbivore in a salinity-stressed non-halophytic plant

View Article: PubMed Central - PubMed

ABSTRACT

During their life, plants face multiple stresses. However, studies on one stress factor have typically neglected possible interactions with other factors. We demonstrated that salt stress in Indian mustard (a plant species not adapted to salinity) lessens the effect of herbivory on plant mass, and increases the plants' constitutive resistance to herbivores. Changes in the plants associated with increased salt that help to explain the mitigation of herbivore effects include decreased protein and macronutrient content. Plants exposed to herbivore damage were also less negatively affected by salt exposure, possibly due to their ability to maintain higher levels of transpiration.

No MeSH data available.


Transpiration rates of Brassica juncea leaves 4 weeks after herbivory treatments. Each point is the mean of the transpiration measured on the leaves of two plants harvested from a hydroponic container. The dashed and solid lines are the least squares fitted lines from the ANCOVA model for the undamaged (open symbols) and damaged (closed symbols) plants, respectively.
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plw028-F2: Transpiration rates of Brassica juncea leaves 4 weeks after herbivory treatments. Each point is the mean of the transpiration measured on the leaves of two plants harvested from a hydroponic container. The dashed and solid lines are the least squares fitted lines from the ANCOVA model for the undamaged (open symbols) and damaged (closed symbols) plants, respectively.

Mentions: Four weeks following exposure to herbivores and simulated herbivory transpiration and stomatal conductance decreased as salinity increased (F1,26 = 12.6, P = 0.0014 and F1,26 = 13.2, P = 0.0012 for the salinity effect on transpiration and stomatal conductance, respectively; Fig. 2). The same trends were found in plants subjected to herbivory, except that they tended to have greater transpiration (36%) and stomatal conductance (33%) than undamaged plants (F1,26 =3.15, P= 0.087 and F1,26 = 3.8, P = 0.062 for the herbivory effect). There was no interaction between salinity and herbivory on transpiration or stomatal conductance (F1,26 = 0.001, P = 0.974 and F1,26 = 0.003, P = 0.954).Figure 2.


Increased resistance to a generalist herbivore in a salinity-stressed non-halophytic plant
Transpiration rates of Brassica juncea leaves 4 weeks after herbivory treatments. Each point is the mean of the transpiration measured on the leaves of two plants harvested from a hydroponic container. The dashed and solid lines are the least squares fitted lines from the ANCOVA model for the undamaged (open symbols) and damaged (closed symbols) plants, respectively.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4940500&req=5

plw028-F2: Transpiration rates of Brassica juncea leaves 4 weeks after herbivory treatments. Each point is the mean of the transpiration measured on the leaves of two plants harvested from a hydroponic container. The dashed and solid lines are the least squares fitted lines from the ANCOVA model for the undamaged (open symbols) and damaged (closed symbols) plants, respectively.
Mentions: Four weeks following exposure to herbivores and simulated herbivory transpiration and stomatal conductance decreased as salinity increased (F1,26 = 12.6, P = 0.0014 and F1,26 = 13.2, P = 0.0012 for the salinity effect on transpiration and stomatal conductance, respectively; Fig. 2). The same trends were found in plants subjected to herbivory, except that they tended to have greater transpiration (36%) and stomatal conductance (33%) than undamaged plants (F1,26 =3.15, P= 0.087 and F1,26 = 3.8, P = 0.062 for the herbivory effect). There was no interaction between salinity and herbivory on transpiration or stomatal conductance (F1,26 = 0.001, P = 0.974 and F1,26 = 0.003, P = 0.954).Figure 2.

View Article: PubMed Central - PubMed

ABSTRACT

During their life, plants face multiple stresses. However, studies on one stress factor have typically neglected possible interactions with other factors. We demonstrated that salt stress in Indian mustard (a plant species not adapted to salinity) lessens the effect of herbivory on plant mass, and increases the plants' constitutive resistance to herbivores. Changes in the plants associated with increased salt that help to explain the mitigation of herbivore effects include decreased protein and macronutrient content. Plants exposed to herbivore damage were also less negatively affected by salt exposure, possibly due to their ability to maintain higher levels of transpiration.

No MeSH data available.