Chlorophyll Fluorescence for Water Deficit Detection in Horticultural Crops?

Corlett, J. E.; Choudhary, R K

doi:10.17660/actahortic.1993.335.28

Cited by 7 publications

(1 citation statement)

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“…In our experiment, the lower Pn observed in the stressed plants depended on stomatal factors, since no significant changes were observed in the Fvm values (Table I), indicating the lack of drought-induced damage of the photochemistry PSII in M. communis plants, as has been reported for many species (Cornic, 1994;Munné-Bosch et al, 2009). According to Corlett and Choudhary (1993), the photochemical efficiency measured as Fvm is only affected when the water stress in horticultural species is very severe.…”

Section: Discussionsupporting

confidence: 75%

Changes in tissue-water relations, photosynthetic activity, and growth ofMyrtus communisplants in response to different conditions of water availability

Navarro

Álvarez

Castillo

et al. 2009

The Journal of Horticultural Science and Biotechnology

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The influence of different levels of water deficit on physiological and morphological alterations in Myrtus communis plants was investigated to evaluate their adaptability to such conditions. M. communis plants growing under greenhouse conditions were subjected to three irrigation treatments between February and August 2007: a control, and two water deficit treatments. Plants submitted to severe water deficit showed reduced shoot and root dry weights, leaf numbers, leaf areas and plant heights, while moderate water deficit reduced only plant height. Leaf colour was not affected by either water deficit treatment. Root hydraulic resistance increased proportionally to the level of drought and lower values of leaf water potential at pre-dawn were observed in both deficit treatments. The absence of osmotic adjustment could explain the reduction of leaf turgor potential at midday. Photosynthesis decreased in both water deficit treatments and was related to stomatal factors, since no significant changes in the values of chlorophyll fluorescence, chlorophyll content or ion leakage were observed. The highest leaf water potential values (Ψl) were found in the early morning and the lowest at midday, in all treatments; the latter coincided with the minimum values of stomatal conductance. Significant differences in Ψl values during the day were noted between treatments, but were always highest in the control. Cell wall rigidity, measured as increased bulk modulus of elasticity increased under severe water stress resulting in a loss of turgor at lower leaf water potential values.

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Section: Discussionsupporting

confidence: 75%