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000056253 0247_ $$2DOI$$a10.1007/s00425-007-0503-5
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000056253 084__ $$2WoS$$aPlant Sciences
000056253 1001_ $$0P:(DE-Juel1)VDB28478$$aThorpe, M. R.$$b0$$uFZJ
000056253 245__ $$a11C-imaging: methyl jasmonate moves in both phloem and xylem, promotes transport of jasmonate, and of photoassimilate even after proton transport is decoupled
000056253 260__ $$aBerlin$$bSpringer$$c2007
000056253 300__ $$a541 - 551
000056253 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000056253 440_0 $$04992$$aPlanta$$v226$$x0032-0935$$y2
000056253 500__ $$aRecord converted from VDB: 12.11.2012
000056253 520__ $$aThe long-distance transport and actions of the phytohormone methyl jasmonate (MeJA) were investigated by using the short-lived positron-emitting isotope 11C to label both MeJA and photoassimilate, and compare their transport properties in the same tobacco plants (Nicotiana tabacum L.). There was strong evidence that MeJA moves in both phloem and xylem pathways, because MeJA was exported from the labeled region of a mature leaf in the direction of phloem flow, but it also moved into other parts of the same leaf and other mature leaves against the direction of phloem flow. This suggests that MeJA enters the phloem and moves in sieve tube sap along with photoassimilate, but that vigorous exchange between phloem and xylem allows movement in xylem to regions which are sources of photoassimilate. This exchange may be enhanced by the volatility of MeJA, which moved readily between non-orthostichous vascular pathways, unlike reports for jasmonic acid (which is not volatile). The phloem loading of MeJA was found to be inhibited by parachloromercuribenzenesulfonic acid (PCMBS) (a thiol reagent known to inhibit membrane transporters), and by protonophores carbonyl cyanide 3-chlorophenylhydrazone (CCCP) and 2,4-dinitrophenol (DNP) suggesting proton co-transport. MeJA was found to promote both its own transport and that of recent photoassimilate within 60 min. Furthermore, we found that MeJA can counter the inhibitory effect of the uncoupling agent, CCCP, on sugar transport, suggesting that MeJA affects the plasma membrane proton gradient. We also found that MeJA's action may extend to the sucrose transporter, since MeJA countered the inhibitory effects of the sulfhydryl reagent, PCMBS, on the transport of photoassimilate.
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000056253 588__ $$aDataset connected to Web of Science, Pubmed
000056253 650_2 $$2MeSH$$a2,4-Dinitrophenol: pharmacology
000056253 650_2 $$2MeSH$$a4-Chloromercuribenzenesulfonate: pharmacology
000056253 650_2 $$2MeSH$$aAcetic Acids: metabolism
000056253 650_2 $$2MeSH$$aBiological Transport: drug effects
000056253 650_2 $$2MeSH$$aCarbon Radioisotopes
000056253 650_2 $$2MeSH$$aCarbonyl Cyanide m-Chlorophenyl Hydrazone: pharmacology
000056253 650_2 $$2MeSH$$aCyclopentanes: metabolism
000056253 650_2 $$2MeSH$$aOxylipins
000056253 650_2 $$2MeSH$$aPhloem: metabolism
000056253 650_2 $$2MeSH$$aPhotosynthesis
000056253 650_2 $$2MeSH$$aTobacco: drug effects
000056253 650_2 $$2MeSH$$aTobacco: metabolism
000056253 650_2 $$2MeSH$$aXylem: metabolism
000056253 650_7 $$00$$2NLM Chemicals$$aAcetic Acids
000056253 650_7 $$00$$2NLM Chemicals$$aCarbon Radioisotopes
000056253 650_7 $$00$$2NLM Chemicals$$aCyclopentanes
000056253 650_7 $$00$$2NLM Chemicals$$aOxylipins
000056253 650_7 $$01211-29-6$$2NLM Chemicals$$amethyl jasmonate
000056253 650_7 $$051-28-5$$2NLM Chemicals$$a2,4-Dinitrophenol
000056253 650_7 $$0554-77-8$$2NLM Chemicals$$a4-Chloromercuribenzenesulfonate
000056253 650_7 $$0555-60-2$$2NLM Chemicals$$aCarbonyl Cyanide m-Chlorophenyl Hydrazone
000056253 650_7 $$06894-38-8$$2NLM Chemicals$$ajasmonic acid
000056253 650_7 $$2WoSType$$aJ
000056253 65320 $$2Author$$amethyl jasmonate
000056253 65320 $$2Author$$acarbon-11
000056253 65320 $$2Author$$aC-11
000056253 65320 $$2Author$$aNicotiana tabacum
000056253 65320 $$2Author$$aphloem loading
000056253 65320 $$2Author$$aphloem transport
000056253 65320 $$2Author$$aplant defenses
000056253 65320 $$2Author$$asectoriality
000056253 65320 $$2Author$$asucrose transporters
000056253 65320 $$2Author$$aPCMBS
000056253 65320 $$2Author$$aCCCP
000056253 65320 $$2Author$$aDNP
000056253 65320 $$2Author$$avascular architecture
000056253 7001_ $$0P:(DE-HGF)0$$aFerrieri, A. P.$$b1
000056253 7001_ $$0P:(DE-HGF)0$$aHerth, M. M.$$b2
000056253 7001_ $$0P:(DE-HGF)0$$aFerrieri, R. A.$$b3
000056253 773__ $$0PERI:(DE-600)1463030-8$$a10.1007/s00425-007-0503-5$$gVol. 226, p. 541 - 551$$p541 - 551$$q226<541 - 551$$tPlanta$$v226$$x0032-0935$$y2007
000056253 8567_ $$uhttp://dx.doi.org/10.1007/s00425-007-0503-5
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000056253 9141_ $$y2007
000056253 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed
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