Initial water deficit effects on Lupinus albus photosynthetic performance, carbon metabolism, and hormonal balance: metabolic reorganization prior to early stress responses

0365274 - ÚEB 2012 RIV GB eng J - Journal Article
Pinheiro, C. - António, C. - Dobrev, Petre - Vaňková, Radomíra - Wilson, J. C. … Total 10 authors
Initial water deficit effects on Lupinus albus photosynthetic performance, carbon metabolism, and hormonal balance: metabolic reorganization prior to early stress responses.
Journal of Experimental Botany. Roč. 62, č. 14 (2011), s. 4965-4974. ISSN 0022-0957. E-ISSN 1460-2431
Institutional research plan: CEZ:AV0Z50380511
Keywords : Carbon metabolism * hormone balance * LC-MS
Subject RIV: EF - Botanics
Impact factor: 5.364, year: 2011

The early (2–4 d) effects of slowly imposed soil water deficit on Lupinus albus photosynthetic performance, carbon metabolism, and hormonal balance in different organs (leaf blade, stem stele, stem cortex, and root) were evaluated on 23-d-old plants (growth chamber assay). Our work shows that several metabolic adjustments occurred prior to alteration of the plant water status, implying that water deficit is perceived before the change in plant water status. The slow, progressive decline in soil water content started to be visible 3 d after withholding water (3 DAW). The earliest plant changes were associated with organ-specific metabolic responses (particularly in the leaves) and with leaf conductance and only later with plant water status and photosynthetic rate (4 DAW) or photosynthetic capacity (according to the Farquhar model; 6 DAW). Principal component analysis (PCA) of the physiological parameters, the carbohydrate and the hormone levels and their relative values.
Permanent Link: http://hdl.handle.net/11104/0200557