Expression profiling of putative Eucalyptus grandisdefence marker genes in response to treatment with methyl jasmonate and salicylic acid

AbstractAxon regeneration is orchestrated by many genes that are differentially expressed in response to injury. Through a comparative analysis of gene expression profiling, injury-responsive genes that are potential targets for understanding the mechanisms underlying regeneration have been revealed. As the efficiency of axon regeneration in both the peripheral and central nervous systems can be manipulated, we suggest that identifying regeneration-associated genes is a promising approach for developing therapeutic applications in vivo. Here, we review the possible roles of stem cell marker- or stemness-related genes in axon regeneration to gain a better understanding of the regeneration mechanism and to identify targets that can enhance regenerative capacity.

Download Full-text

CHEMICAL INDUCTION OF TRAUMATIC GUM DUCTS IN CHINESE SWEETGUM, LIQUIDAMBAR FORMOSANA

IAWA Journal ◽

10.1163/22941932-00000085 ◽

2015 ◽

Vol 36 (1) ◽

pp. 58-68 ◽

Cited By ~ 3

Author(s):

Yawen Zheng ◽

Biao Pan ◽

Takao Itohl

Keyword(s):

Methyl Jasmonate ◽

Tree Species ◽

Strong Relationship ◽

Growing Season ◽

Cambial Activity ◽

Response To Treatment ◽

Chemical Induction

The effect of ethephon (Et) and methyl jasmonate (MeJA) on the induction of traumatic gum ducts (TGDs) was studied in Chinese sweetgum, Liquidambar formosana, a broad-leaved tree species. Lanolin pastes with concentrations of 1, 2 and 5% (w/w) of these chemicals were applied to the intact bark of the trees in May, July and September without any wounding. The trees did not show any response to the treatment of MeJA, but TGDs were formed in response to treatment with Et. Trees treated with Et in the active growing season (May) produced more rows of TGDs than those treated in July or September, suggesting a strong relationship between cambial activity and susceptibility to TGD induction. These results are discussed in comparison with responses of conifers and some angiosperms to MeJA and Et treatments with and without associated wounding reported in the literature.

Download Full-text

Exogenous application of methyl jasmonate induces defense response and develops tolerance against mungbean yellow mosaic India virus in Vigna mungo

Functional Plant Biology ◽

10.1071/fp18168 ◽

2019 ◽

Vol 46 (1) ◽

pp. 69 ◽

Cited By ~ 6

Author(s):

Nibedita Chakraborty ◽

Jolly Basak

Keyword(s):

Methyl Jasmonate ◽

Molecular Mechanisms ◽

Stability Index ◽

Protective Role ◽

Membrane Stability ◽

Vigna Mungo ◽

Marker Genes ◽

Exogenous Application ◽

Ros Homeostasis

Vigna mungo (L.)Hepper is an economically important leguminous crop in south-east Asia. However, its production is severely affected by Mungbean yellow mosaic India virus (MYMIV). It is well established that methyl jasmonate (MeJA) is effective in inducing resistance against pathogens in several plants. To assess the role of MeJA in developing MYMIV tolerance in V. mungo, we analysed time-dependent biochemical and molecular responses of MYMIV susceptible V. mungo after exogenous application of different MeJA concentrations, followed by MYMIV infection. Our analysis revealed that exogenous application of different concentrations of MeJA resulted in decreased levels of malondialdehyde with higher membrane stability index values in MYMIV susceptible V. mungo, suggesting the protective role of MeJA through restoring the membrane stability. Moreover, the level of expression of different antioxidative enzymes revealed that exogenous MeJA is also very effective in ROS homeostasis maintenance. Enhanced expressions of the defence marker genes lipoxygenase and phenylalanine ammonia-lyase and the reduced expression of the MYMIV coat-protein encoding gene in all MeJA treated plants post MYMIV infection revealed that exogenous application of MeJA is effective for MYMIV tolerance in V. mungo. Our findings provide new insights into the physiological and molecular mechanisms of MYMIV tolerance in Vigna induced by MeJA.

Download Full-text