An investigation into the role of light during desiccation of three angiosperm resurrection plants

Farrant, Jill M.; Willigen, Clare Vander; Loffell, D. A.; Bartsch, Sandra; Whittaker, Anne

doi:10.1046/j.0016-8025.2003.01052.x

Cited by 124 publications

(83 citation statements)

References 47 publications

(96 reference statements)

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“…This agrees with the hypotheses presented by Farrant et al, (2003) who described, that chlorophyll maintenance under drought should be balanced by ROS scavenging mechanisms. Indeed, we found that both total chlorophyll and carotenoids decreased under drought stress conditions.…”

Section: Correlation Analysissupporting

confidence: 82%

“…In thylakoids it happens due to over-reduction of both photosystems (PS), which are no longer able to accept excess of excitation energy from light-harvesting chlorophyll protein complexes (LHCP) (Demmig-Adams and Adams, 1992; Reddy et al, 2004;Schmid, 2008). Such electron surplus that can lead to ROS formation can be avoided: (i) by degrading chlorophyll to primarily avoid ROS formation as in poikilochlorophyllous plants (Maslova and Popova, 1993;Keiper et al, 1998;; (ii) by retaining chlorophyll as in homoiochlorophyllous plants and simultaneously triggering the anti-oxidative scavenging mechanisms listed above to avoid further cell structure damage (Farrant et al, 2003). Many reports emphasize the role of carotenoids (especially xanthophylls) in direct deactivation of ROS in homoiochlorophyllous plants (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Does a terminal drought tolerance QTL contribute to differences in ROS scavenging enzymes and photosynthetic pigments in pearl millet exposed to drought?

Kholová

Hash

Kočová

et al. 2011

Environmental and Experimental Botany

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Section: Correlation Analysissupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Does a terminal drought tolerance QTL contribute to differences in ROS scavenging enzymes and photosynthetic pigments in pearl millet exposed to drought?

Kholová

Hash

Kočová

et al. 2011

Environmental and Experimental Botany

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“…In particular, the leaves fold upward to a position where the adaxial surfaces are appressed against the stem (Fig. 1) and the sclerenchymous leaf ribs (Grundell, 1933) move closer to one another, thereby closing the leaf face, which has been proposed to minimize the exposure of the desiccated leaf to light (Farrant et al, 2003). Electron microscopy of hydrated and desiccated leaves revealed further morphological changes that occurred upon desiccation (Fig.…”

Section: Resultsmentioning

confidence: 99%

Response of the Leaf Cell Wall to Desiccation in the Resurrection Plant Myrothamnus flabellifolius

et al. 2006

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The Myrothamnus flabellifolius leaf cell wall and its response to desiccation were investigated using electron microscopic, biochemical, and immunocytochemical techniques. Electron microscopy revealed desiccation-induced cell wall folding in the majority of mesophyll and epidermal cells. Thick-walled vascular tissue and sclerenchymous ribs did not fold and supported the surrounding tissue, thereby limiting the extent of leaf shrinkage and allowing leaf morphology to be rapidly regained upon rehydration. Isolated cell walls from hydrated and desiccated M. flabellifolius leaves were fractionated into their constituent polymers and the resulting fractions were analyzed for monosaccharide content. Significant differences between hydrated and desiccated states were observed in the water-soluble buffer extract, pectin fractions, and the arabinogalactan protein-rich extract. A marked increase in galacturonic acid was found in the alkali-insoluble pectic fraction. Xyloglucan structure was analyzed and shown to be of the standard dicotyledonous pattern. Immunocytochemical analysis determined the cellular location of the various epitopes associated with cell wall components, including pectin, xyloglucan, and arabinogalactan proteins, in hydrated and desiccated leaf tissue. The most striking observation was a constitutively present high concentration of arabinose, which was associated with pectin, presumably in the form of arabinan polymers. We propose that the arabinan-rich leaf cell wall of M. flabellifolius possesses the necessary structural properties to be able to undergo repeated periods of desiccation and rehydration.

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“…Mean in each column followed by same letters are not significantly different at the P 0.05 by one-way ANOVA with Duncan's multiple range tests For the photosynthetic pigment contents changes were reported on other resurrection plants species following dehydration and rehydration cycle, Boea hygrometrica (Deng et al 2000), Craterostigma plantagineum (Scott 2000), Sporobulus stapfianus (Quartacci et al 1997), Boea hygroscopica (Navari-Izzo et al 1995), Xerophyta sp. (Sherwin and Farrant 1996;Farrant et al 2003;Perez et al 2011), Reaumuria soongorica (Xu et al 2008), H. rhodopensis (Nagy-Deri et al 2011).…”

Section: Photosynthetic Pigmentsmentioning

confidence: 99%

Chlorophyll fluorescence imaging of photosynthetic activity and pigment contents of the resurrection plants Ramonda serbica and Ramonda nathaliae during dehydration and rehydration

Gashi

Babani

Kongjika

2013

Physiol Mol Biol Plants

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The desiccation-tolerant plants of the R. serbica and R. nathaliae are resurrection plants which are able to fully recover their physiological function after anabiosis. A comparison of chlorophyll fluorescence imaging and photosynthetic pigment contents responses of R. serbica and, for the first time, R. nathaliae to dehydration and rehydration were investigated. For this purpose, plants after collection from their natural habitats were kept fully watered for 14 days at natural condition. The experiment was conducted with mature leaves of both species. R. serbica and R. nathaliae plants were dehydrated to 5.88 % and 7.87 % relative water content (RWC) by withholding water for 15 days, afterwards the plants were rehydrated for 72 hours to 94.67 % and 97.02 % RWC. During desiccation, R. serbica plants preserved the chlorophyll content about 84 %, while R. nathaliae about 90 %. During dehydration when RWC were more than 40 %, photochemical efficiency of PSII for photochemistry, the Fv/Fm ratio, decreased about 40 % in R. nathaliae plants, but a strong reduction with 60 % was recorded for R. serbica. Following rehydration, the Fv/Fm ratio recovered more rapidly in R. nathaliae. The higher photosynthetic rates could also be detected via imaging the chlorophyll fluorescence decrease ratio Rfd, which possessed higher values after rehydration leaves of R.nathaliae as compared to R. serbica. The results showed that the photosynthetic activity and chlorophyll contents after rehydration are recovered more rapidly in R. nathaliae in comparison to R. serbica.

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An investigation into the role of light during desiccation of three angiosperm resurrection plants

Abstract: ABSTRACT

Cited by 124 publications

References 47 publications

Does a terminal drought tolerance QTL contribute to differences in ROS scavenging enzymes and photosynthetic pigments in pearl millet exposed to drought?

Does a terminal drought tolerance QTL contribute to differences in ROS scavenging enzymes and photosynthetic pigments in pearl millet exposed to drought?

Response of the Leaf Cell Wall to Desiccation in the Resurrection Plant Myrothamnus flabellifolius

Chlorophyll fluorescence imaging of photosynthetic activity and pigment contents of the resurrection plants Ramonda serbica and Ramonda nathaliae during dehydration and rehydration

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