Girdling interruption between source and sink in Quercus pubescens does not trigger leaf senescence

Title:

Girdling interruption between source and sink in Quercus pubescens does not trigger leaf senescence

Creator:

Holland, V., Fragner, L., Jungcurt, T., Weckwerth, W., and Brüggemann, W.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:1e3d1121-01c6-419b-b08c-8b2a0ec1c2a6
uuid:1e3d1121-01c6-419b-b08c-8b2a0ec1c2a6
issn:0300-3604
doi:10.1007/s11099-016-0646-3

Subject:

metabolomika, metabolomics, fluorescence chlorofylu, změny klimatu, JIP-test, PEA, SPAD, chlorophyll fluorescence, climate change, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

Metabolite changes and senescence behaviour after mechanical phloem girdling were studied in leaf tissue of Quercus pubescens. Sugar accumulation is not only considered to be an important part of several developmental signalling pathways, but is also seen as one of the basic triggers for senescence induction, or at least an obligatory accessory phenomenon. Our survey showed that an accumulation of the soluble sugars, glucose and fructose, was not on its own obligatorily connected with the induction of leaf senescence, since no indication or even an onset of senescence could be observed during the course of the experiment. Instead, we observed an inhibition of leaf development with a decrease of photosynthesis and a slow-down of development in nearly all chlorophyll a fluorescence analysis parameters using the JIP-test. We detected a change of metabolites linked to oxidative stress, possibly due to an overexcitation of the developmentally inhibited photosynthetic apparatus., V. Holland, L. Fragner, T. Jungcurt, W. Weckwerth, W. Brüggemann., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

589-597

Source:

Photosynthetica | 2016 Volume:54 | Number:4

Harvested from:

CDK

Metadata only:

false