Desiccation of the resurrection plant Haberlea rhodopensis at high temperature

Mihailova, Gergana; Petkova, S.; Büchel, Claudia; Georgieva, Katya

doi:10.1007/s11120-011-9644-2

Cited by 29 publications

(22 citation statements)

References 30 publications

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“…The photosynthetic apparatus associated with PSII is highly sensitive to heat, drought, and various other stresses [13], [28] that usually reduce the photosynthetic rate and increase the rate of photorespiration [9], [29]. In the present study, a continuous reduction in photosynthetic rate, which reflected the level of stress, was deduced from the change in chlorophyll fluorescence ( F v / F m ) under three different stress regimes (Figure 2A and B).…”

Section: Discussionmentioning

confidence: 55%

Comparative Physiological and Proteomic Analyses of Poplar (Populus yunnanensis) Plantlets Exposed to High Temperature and Drought

Yang

Sun

et al. 2014

PLoS ONE

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Plantlets of Populus yunnanensis Dode were examined in a greenhouse for 48 h to analyze their physiological and proteomic responses to sustained heat, drought, and combined heat and drought. Compared with the application of a single stress, simultaneous treatment with both stresses damaged the plantlets more heavily. The plantlets experienced two apparent response stages under sustained heat and drought. During the first stage, malondialdehyde and reactive oxygen species (ROS) contents were induced by heat, but many protective substances, including antioxidant enzymes, proline, abscisic acid (ABA), dehydrin, and small heat shock proteins (sHSPs), were also stimulated. The plants thus actively defended themselves against stress and exhibited few pathological morphological features, most likely because a new cellular homeostasis was established through the collaborative operation of physiological and proteomic responses. During the second stage, ROS homeostasis was overwhelmed by substantial ROS production and a sharp decline in antioxidant enzyme activities, while the synthesis of some protective elements, such as proline and ABA, was suppressed. As a result, photosynthetic levels in P. yunnanensis decreased sharply and buds began to die, despite continued accumulation of sHSPs and dehydrin. This study supplies important information about the effects of extreme abiotic environments on woody plants.

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Section: Discussionmentioning

confidence: 55%

Comparative Physiological and Proteomic Analyses of Poplar (Populus yunnanensis) Plantlets Exposed to High Temperature and Drought

Yang

Sun

et al. 2014

PLoS ONE

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“…In addition, the RWC of R. nathaliae decreased from 94.5 % to 3.6 % during dehydration (Jovanoviç et al 2011). Kinetics of relative water content during dehydration-rehydration cycle was reported from other authors in R. serbica (Augusti et al 2001;Quartacci et al 2002;Veljovic-Jovanoviç et al 2006;Sgherri et al 2004) and Haberlea rhodopensis (Nagy- Deri et al 2011;Mihailova et al 2011;Djilianov et al 2011;Georgieva et al 2010).…”

Section: Relative Water Contentmentioning

confidence: 51%

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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“…The results generally concluded that PSII was liable to be injured by high temperature, and PSII components including oxygen-evolving complex, reaction center, light-harvesting complex and electron acceptor had different heat sensitivity. Both slight change and obvious decline in PSI activity were reported in plants exposed to high temperature, and consistently, PSI was demonstrated to be more tolerant than PSII (Sayed et al, 1989;Boucher and Carpentier, 1993;Mihailova et al, 2011;Essemine et al, 2012). However, PSI and PSII performances were not simultaneously monitored in these studies.…”

Section: Introductionmentioning

confidence: 90%

Characterization of photosynthetic electron transport chain in bioenergy crop Jerusalem artichoke (Helianthus tuberosus L.) under heat stress for sustainable cultivation

Chen

Shao

et al. 2013

Industrial Crops and Products

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a b s t r a c tIn order to explore the response of photosynthetic electron transport chain to heat stress, chlorophyll a fluorescence and modulated 820 nm reflection transients were examined in the leaves of Jerusalem artichoke (Helianthus tuberosus L.). J step was elevated at 43• C, suggesting that electron transport beyond primary quinone electron acceptor of photosystem II (Q A ) was inhibited. I step was elevated at 45• C due to the lowered plastoquinol re-oxidation rate. Significant decrease in the Q A reducing reaction centers per photosystem II (PSII) antenna chlorophyll and marked increase in relative variable fluorescence intensity at 300 s also occurred at 45• C, indicating that the electron transport chain from PSII donor side to Q A was injured. Overall, the fragment between Q A and plastoquinol is the most susceptible to heat in the electron transport chain before photosystem I (PSI). The maximal photochemical capacity of PSI was not affected by heat stress even at 48• C, and the interaction between PSII and PSI become unbalanced, when temperature rose to 45• C. At 45 • C, prolonged PSI oxidation occurred in the expanding leaves because of the inhibited electron donation from PSII, however, PSI oxidation amplitude decreased in the expanded leaves. We infer that electron transport chain of PSI acceptor side is more sensitive to heat stress than the chain before PSI in the expanded leaves. Therefore, electrons in PSI reaction center could not be efficiently drained to the downstream at high temperature, and then PSI oxidation was blocked.

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Desiccation of the resurrection plant Haberlea rhodopensis at high temperature

Cited by 29 publications

References 30 publications

Comparative Physiological and Proteomic Analyses of Poplar (Populus yunnanensis) Plantlets Exposed to High Temperature and Drought

Comparative Physiological and Proteomic Analyses of Poplar (Populus yunnanensis) Plantlets Exposed to High Temperature and Drought

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

Characterization of photosynthetic electron transport chain in bioenergy crop Jerusalem artichoke (Helianthus tuberosus L.) under heat stress for sustainable cultivation

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