Počet záznamů: 1

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

  1. 1.
    0365274 - UEB-Q 2012 RIV GB eng J - Článek v odborném periodiku
    Pinheiro, C. - António, C. - Dobrev, Petre - Vaňková, Radomíra - Wilson, J. C.
    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
    Výzkumný záměr: CEZ:AV0Z50380511
    Klíčová slova: Carbon metabolism * hormone balance * LC-MS
    Kód oboru RIV: EF - Botanika
    Impakt faktor: 5.364, rok: 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.
    Trvalý link: http://hdl.handle.net/11104/0200557