Differences in the physiological state between triticale and maize plants during drought stress and followed rehydration expressed by the leaf gas exchange and spectrofluorimetric methods

• Autorzy: Hura T , Grzesiak S. , Hura K. , Grzesiak M. , Rzepka A.
• Języki publikacji: EN

Abstrakty

EN

The studies were carried out in order to estimate differences in the physiological state between triticale and maize plants subjected to drought stress followed by rehydration. The physiological state of the plants was evaluated by measurements of leaf water potential, net photosynthesis, transpiration and stomatal conductance. Spectrofluorimetric methods for the study of blue, green and red fluorescence were applied. We observed that the soil drought induced a greater water loss in triticale leaves than in maize and consequently caused greater injusies to the photosynthetic appasatus. Moreover, triticale plant recovery was slower than in maize plants during the rehydration phase. The effect was probably connected with the higher functional and structural disorganisation of the photo synthetic appasatus observed during drought stress in triticale. Water stress is responsible for damages to photo - system PS II. The worst light utilisation in photosynthetic light conversion was recorded as an increase in the intensity of red fluorescence. Drought stress induced a strong increase in the intensity of blue and green fluorescence in the studied species and it was still high in maize plants during the first day of rehydration. Increase in the intensity of blue and green fluorescence in maize seems to be the effect of the photoprotection mechanism which prevents damage to PS II through utilisation of excess energy.

Słowa kluczowe

EN

drought stress; plant physiology; triticale; red fluorescence; spectrofluorimetric method; water potential; leaf; blue fluorescence; rehydration; green fluorescence; photosynthesis; gas exchange; plant stress; maize

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2006
• Tom: 28
• Numer: 5
• Opis fizyczny: p.433-443,fig.,ref.

Twórcy

autor

Hura T

• Polish Academy of Sciences, Niezapominajek 21, 30-239 Krakow, Poland

autor

Grzesiak S.

autor

Hura K.

autor

Grzesiak M.

autor

Rzepka A.

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