Signalling and Antioxidant Defence Mechanisms in Higher Plants

Karpiński, Stanisław; Karpińska, Barbara; Meltzer, Michael; Hällgren, Jan-Erik; Wingsle, Gunnar

doi:10.1007/978-94-015-9803-3_7

Cited by 10 publications

(21 citation statements)

References 94 publications

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“…This may be achieved through leaf movements and rolling, production of reflecting surfaces, movement of chloroplasts to the opposite side of the cell to light incidence, decreases in chl content, etc. Such mechanisms may decrease the absorption of incident radiation by up to 40 % (Larcher, 1995;Lawlor, 2001;Karpinski et al, 2002).…”

Section: Control Of Oxidative Stress As a Decisive Component Of Drougmentioning

confidence: 99%

“…This includes the state-transition mechanism, understood as the migration of LHCs between PSII and PSI that allows a better redistribution of excitation energy. If the LHCs just disconnect from PSII, dissipating the absorbed energy, this will configure a dissipation mechanism that protects P 680 (Adams and Demmig-Adams, 1995;Horton et al, 1996;Kornyeyev et al, 2001;Karpinski et al, 2002). Other dissipation mechanisms include the photorespiration pathway and the pseudocyclic electron transport process (Mehler Reaction), both of which require complementary mechanisms for O 2…”

Section: Control Of Oxidative Stress As a Decisive Component Of Drougmentioning

confidence: 99%

“…•− removal, as well as increases in both non-photochemical quenching and contents of photoprotective pigments (β-carotene, lutein and zeaxanthin), which act through thermal dissipation (Siefermann-Harms, 1988;Young, 1991;De Las Rivas et al, 1993;Krause, 1994;Krivosheeva et al 1996;Niyogi et al, 1997;Xu et al, 1999;Havaux and Kloppstech 2001;Adams et al, 2002;Foyer, 2002;Karpinski et al, 2002). These processes decrease the production of highly reactive compounds and prevent the over-reduction of the electron transport chain and the overacidification of the thylakoid lumen, which sensitize PSII to photodamage (Müller et al, 2001;Mano, 2002).…”

Section: Control Of Oxidative Stress As a Decisive Component Of Drougmentioning

confidence: 99%

“…Decreases in the MGDG/ DGDG ratio due to a preferential DGDG synthesis have been related to higher tolerance to cold (Hurry et al, 1998;Iba, 2002;Karpinski et al, 2002) and drought (Gigon et al, 2004). However, such changes were insufficient to increase cold tolerance, as found in C. dewevrei, C. canephora cv.…”

Section: Control Of Oxidative Stress As a Decisive Component Of Drougmentioning

confidence: 99%

“…In Icatu, oxidative stress was in fact much more controlled, as inferred from (i) the maintenance ( • OH) or decrease (H 2 O 2 ) of ROS levels, (ii) the strong increase of some photoprotective pigments (e.g., zeaxanthin and lutein) and (iii) the maintenance of high activities of antioxidant enzymes (chloroplast Cu,Zn-SOD and APX), especially during the cold exposure period Ramalho et al, unpublished data). On the other hand, it is reasonable to admit that with temperatures close to 0ºC the antioxidative mechanisms based on enzymes will be severely suppressed in vivo (Geiger et al, 1992;Adams and Demmig-Adams, 1995), turning even more important the reinforcement of the xanthophylls (zeaxanthin and lutein) and β-carotene contents in the LHC (Pogson et al, 1998;Havaux and Niyogi, 1999;Karpinski et al, 2002). This justifies the strong increases (and the highest absolute contents) in those pigments in Icatu (and partially in Catuaí) and helps to explain its relatively high-cold tolerance Ramalho et al, unpublished results).…”

Section: Control Of Oxidative Stress As a Decisive Component Of Drougmentioning

confidence: 99%

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Impacts of drought and temperature stress on coffee physiology and production: a review

DaMatta

Ramalho

2006

Braz. J. Plant Physiol.

496

398

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Overall, drought and unfavourable temperatures are the major climatic limitations for coffee production. These limitations are expected to become increasingly important in several coffee growing regions due to the recognized changes in global climate, and also because coffee cultivation has spread towards marginal lands, where water shortage and unfavourable temperatures constitute major constraints to coffee yield. In this review, we examine the impacts of such limitations on the physiology, and consequently on the production of mainly Coffea arabica and C. canephora, which account for about 99 % of the world coffee bean production. The first section deals with climatic factors and the coffee plant's requirements. The importance of controlling oxidative stress for the expression of drought and cold tolerance abilities is emphasized in the second section. In the third section, we examine the impacts of drought on cell-water relations, stomatal behaviour and water use, photosynthesis and crop yield, carbon and nitrogen metabolism, root growth and characteristics, and on drought tolerance. In the fourth section, the impacts of low positive and high temperatures on coffee physiology are discussed; some insights about effects of negative temperatures are also presented. Finally, the last section deals with shading in harsh environments as a mean of buffering climatic fluctuations, as well as of increasing environmental sustainability in coffee exploitation. Key words: Coffea, chilling, frost, heat, photosynthesis, water deficit, water use, yield.Impactos da seca e do estresse térmico sobre a fisiologia e a produção do cafeeiro: uma revisão: De modo geral, seca e temperaturas desfavoráveis são as principais limitações climáticas à produção do cafeeiro. A importância de tais limitações deve aumentar, em função das mudanças reconhecidas no clima global e, também, porque a cafeicultura vem sendo expandida para regiões marginais onde secas e temperaturas desfavoráveis se constituem em grandes limitações à produção do café. Nesta revisão, analisam-se os impactos de tais limitações sobre a fisiologia, e por extensão sobre a produção, principalmente de Coffea arabica e C. canephora, que respondem por cerca de 99 % da produção mundial. A primeira seção deste trabalho aborda as exigências climáticas do cafeeiro. Na segunda seção, enfatiza-se a importância do controle do estresse oxidativo para a expressão da capacidade de tolerância à seca e ao frio. Na terceira, examinam-se os impactos da seca sobre as relações hídricas em nível celular, comportamento estomático e uso da água, fotossíntese e produção, metabolismo do carbono e do nitrogênio, caracterís-ticas e respostas de crescimento das raízes, além da tolerância à seca. Na quarta seção, discutem-se impactos tanto de baixas temperaturas positivas como de altas temperaturas sobre a fisiologia do cafeeiro; apresentam-se, também, algumas informações sobre efeitos de temperaturas negativas. Finalmente, na última seção, discute-se sobre o sombreamento como um meio de tamponament...

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Section: Control Of Oxidative Stress As a Decisive Component Of Drougmentioning

confidence: 99%

Section: Control Of Oxidative Stress As a Decisive Component Of Drougmentioning

confidence: 99%

Section: Control Of Oxidative Stress As a Decisive Component Of Drougmentioning

confidence: 99%

Section: Control Of Oxidative Stress As a Decisive Component Of Drougmentioning

confidence: 99%

Section: Control Of Oxidative Stress As a Decisive Component Of Drougmentioning

confidence: 99%

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Impacts of drought and temperature stress on coffee physiology and production: a review

DaMatta

Ramalho

2006

Braz. J. Plant Physiol.

496

398

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Impact of Ozone on Trees: an Ecophysiological Perspective

Matyssek

Sandermann²

2003

Progress in Botany

238

168

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Microscopic structure of Scots pine (Pinus sylvestris (L.)) needles during ageing and autumnal senescence

Kivimäenpää

Sutinen

2007

Trees

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Needle ageing and senescence were studied in Scots pine (Pinus sylvestris) trees growing in natural conditions with minimal anthropogenic influence. The four existing needle generations were analyzed by light and transmission electron microscopy before and during autumnal yellowing of the oldest needle generation. The change from green to yellow occurred within less than 4 days in central Finland. The structure of the oldest needles remained largely intact as long as they were green. Increase in mitochondrion size and hypertrophy of the phloem parenchyma were the only changes, probably related to the approaching senescence. In the yellow needles, the structure of the mesophyll tissue varied from nearly intact with reduced chloroplasts and higher numbers of plastoglobuli, to totally disintegrated cells. In the disintegrated cells, peroxisomes were absent, and chloroplasts were smaller with a patchy appearance and degraded, eventually emptylooking stroma. Mitochondria were enlarged, but retained integrity until the last stages of deterioration, and lipids increased. At the light microscopic level, vacuolar volume in mesophyll cells and cavity formation in transfusion tissue increased. Ageing was characterized by increases in the vacuolar volume and cytoplasmic lipids, altered appearance of vacuolar tannin from homogenous 'sandy', to large spherical drops and finally to a large mass in the mesophyll, and by hypertrophy and tannin accumulation in the phloem parenchyma. Changes related to needle ageing, senescence and cell location in the mesophyll tissue were discussed relative to findings with stress by strong light, weather conditions and ozone.

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Signalling and Antioxidant Defence Mechanisms in Higher Plants

Cited by 10 publications

References 94 publications

Impacts of drought and temperature stress on coffee physiology and production: a review

Impacts of drought and temperature stress on coffee physiology and production: a review

Impact of Ozone on Trees: an Ecophysiological Perspective

Microscopic structure of Scots pine (Pinus sylvestris (L.)) needles during ageing and autumnal senescence

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