Methyl jasmonate elicits rapid changes in carbon and nitrogen dynamics in tomato - Cannabis Botany and Advanced Growing Science - International Cannagraphic Magazine Forums

Storm Shadow · 03-14-2011, 09:41 AM

https://www.biomedsearch.com/nih/Meth.../20723074.html

Methyl jasmonate elicits rapid changes in carbon and nitrogen dynamics in tomato

Evidence is emerging to support the notion that in response to herbivory, plants undergo changes in their primary metabolism and are able to fine-tune the allocation of new and existing resources and temporarily direct them to storage organs. • We hypothesized that simulated herbivory increases the export of resources out of the affected tissues and increases allocation to roots. We used short-lived radioisotopes to study in vivo the dynamics of newly incorporated (11)CO(2) and (13)NH(3). Methyl jasmonate (MeJA), a known defense elicitor, was applied to the foliage of tomato plants and 4 h later we monitored leaf uptake, export and whole-plant allocation of [(11)C]photosynthate and [(13)N]amino acids. • There was a marginally significant decrease in the fixation of (11)CO(2), and an increase in the export of newly acquired carbon and nitrogen out of MeJA-treated leaves. The proportion of nitrogen allocated to roots increased, whereas the proportion of carbon did not change. • These results are in agreement with our hypotheses, showing a change in the allocation of resources after treatment with MeJA; this may reduce the chance of resources being lost to herbivores and act as a buffer to biotic stress by increasing the potential for plant regrowth and survival after the attack.

dizzlekush · 09-14-2011, 03:36 AM

a good study. seems smart to wait for any exogenous MeJA applications after peak bud production has already occurred. since MeJA decreased CO2 fixation perhaps CO2 supplementation during/post MeJA applications has a different level of effectiveness than before. either way it seems like less CO2 supplementation would be required post exogenous MeJA application.

my question is when you spray an ENTIRE plant with MeJA, what amount of amino acids and photosynthates go to the roots, how long lasting is it and could this drainage of nutrition be used to your advantage harvest wise ( e.g.less chlorophyll content at harvest time)?

sup kobe24.

03-14-2011, 09:41 AM	#1
Storm Shadow Senior Member Join Date: Mar 2011 Posts: 4,639	Methyl jasmonate elicits rapid changes in carbon and nitrogen dynamics in tomato https://www.biomedsearch.com/nih/Meth.../20723074.html Methyl jasmonate elicits rapid changes in carbon and nitrogen dynamics in tomato Evidence is emerging to support the notion that in response to herbivory, plants undergo changes in their primary metabolism and are able to fine-tune the allocation of new and existing resources and temporarily direct them to storage organs. • We hypothesized that simulated herbivory increases the export of resources out of the affected tissues and increases allocation to roots. We used short-lived radioisotopes to study in vivo the dynamics of newly incorporated (11)CO(2) and (13)NH(3). Methyl jasmonate (MeJA), a known defense elicitor, was applied to the foliage of tomato plants and 4 h later we monitored leaf uptake, export and whole-plant allocation of [(11)C]photosynthate and [(13)N]amino acids. • There was a marginally significant decrease in the fixation of (11)CO(2), and an increase in the export of newly acquired carbon and nitrogen out of MeJA-treated leaves. The proportion of nitrogen allocated to roots increased, whereas the proportion of carbon did not change. • These results are in agreement with our hypotheses, showing a change in the allocation of resources after treatment with MeJA; this may reduce the chance of resources being lost to herbivores and act as a buffer to biotic stress by increasing the potential for plant regrowth and survival after the attack.
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09-14-2011, 03:36 AM	#2
dizzlekush Member Join Date: Jul 2011 Posts: 458	a good study. seems smart to wait for any exogenous MeJA applications after peak bud production has already occurred. since MeJA decreased CO2 fixation perhaps CO2 supplementation during/post MeJA applications has a different level of effectiveness than before. either way it seems like less CO2 supplementation would be required post exogenous MeJA application. my question is when you spray an ENTIRE plant with MeJA, what amount of amino acids and photosynthates go to the roots, how long lasting is it and could this drainage of nutrition be used to your advantage harvest wise ( e.g.less chlorophyll content at harvest time)? sup kobe24.
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