Abstract
Activity of catalase (EC 1.11.1.6) and variable fluorescence (F) were measured in sections of rye leaves (Secale cereale L. cv. Halo) that were exposed for 24 h to moderately high irradiance under osmotic or chemical stress conditions (paraquat, DCMU, mannitol, NaCl, CdCl2, CuSO4, Pb(NO3)2, KNO2, or K2SO3). Changes of the chlorophyll content and of enzyme activities related to peroxide metabolism, such as glycolate oxidase, glutathione reductase, and peroxidase, were assayed for comparison. In the presence of the herbicides paraquat and low DCMU concentrations that exert only partial inhibition of photosynthesis, as well as after most treatments with osmotic or chemical stress factors, catalase markedly declined due to a preferential photoinactivation. At higher DCMU levels catalase did not decline. At low KNO2 concentrations catalase activity was preferentially increased. In general, photoinactivation of catalase was accompanied by a decline of the F/Fm ratio, indicating photoinhibition of photosystem II, while other parameters were much more stable. Inasmuch as both catalase and the D1 reaction center protein of photosystem II have a rapid turnover in light, their steady state levels appear to decline whenever stress effects either excessively enhance deleterious oxidative conditions and degradation (e. g. Paraquat, low DCMU), or inhibit repair synthesis. Photoinactivation of catalase and of photosystem II represent specific and widely occurring early symptoms of incipient photodamage indicating stress conditions where the repair capacity is not sufficient. During prolonged exposures, e. g. to NaCl and CuSO4, chlorophyll was bleached in light and the rate of its photodegradation increased in proportion as the catalase level had declined. The results suggest that the enhanced susceptibility of leaf tissues to photooxidative damage which is widely observed in stressed plants is related to the early loss of catalase.
References
43
Referenced
57
10.1104/pp.24.1.1
10.1104/pp.90.4.1267
10.1016/0968-0004(92)90503-2
10.1111/j.1751-1097.1969.tb07229.x
10.1111/j.1751-1097.1981.tb08973.x
10.1104/pp.90.4.1492
10.1016/0160-9327(71)90039-1
10.3109/10715769109145861
10.1016/0003-9861(86)90365-6
10.1007/BF00390020
10.1104/pp.100.3.1554
10.1007/BF00402971
/ Planta / Photoinhibition of photosynthesis in intact bean leaves: role of light, temperature and requirement for chloroplast protein synthesis during recovery by Greer D. H. (1986)10.1111/j.1399-3054.1991.tb02130.x
10.1007/BF00387064
10.1104/pp.100.3.1547
10.1007/BF00037181
/ Photosynth. Res. / Recovery from photoinhibition: effect of light and inhibition of protein synthesis of 32‐kD chloroplast protein by Huse H. (1989)10.1515/znc-1987-7-801
10.1104/pp.43.7.1115
10.1093/oxfordjournals.aob.a086002
10.1007/BF00409139
10.1111/j.1399-3054.1988.tb02020.x
10.1146/annurev.pp.42.060191.001525
{'key': 'e_1_2_2_24_1', 'first-page': '156', 'article-title': 'Effect of cadmium treatment on the photosynthetic apparatus and its photochemical activities in greening radish seedlings', 'volume': '21', 'author': 'Krupa Z.', 'year': '1987', 'journal-title': 'Photosynthetica'}
/ Photosynthetica / Effect of cadmium treatment on the photosynthetic apparatus and its photochemical activities in greening radish seedlings by Krupa Z. (1987){'key': 'e_1_2_2_25_1', 'first-page': '197', 'volume-title': 'Photoinhibition', 'author': 'Kyle D. J.', 'year': '1987'}
/ Photoinhibition by Kyle D. J. (1987)10.1073/pnas.81.13.4070
10.1111/j.1462-5822.2007.00901.x
10.1016/S0176-1617(11)80741-8
10.1093/jxb/38.5.842
10.1073/pnas.81.5.1380
10.1016/0092-8674(89)90897-0
10.1126/science.150.3692.74
10.1016/S0176-1617(89)80158-0
10.1007/BF00409140
10.1104/pp.70.4.994
10.1146/annurev.pp.35.060184.000311
{'key': 'e_1_2_2_37_1', 'first-page': '295', 'volume-title': 'The Photosystems, Structure, Function and Molecular Biology', 'author': 'Prásil O.', 'year': '1992'}
/ The Photosystems, Structure, Function and Molecular Biology by Prásil O. (1992)10.1016/S0005-2728(89)80240-3
10.1016/0006-291X(81)91928-8
{'key': 'e_1_2_2_40_1', 'first-page': '295', 'article-title': 'Oxides of nitrogen and their impact upon vegetation', 'volume': '5', 'author': 'Rowland A.', 'year': '1985', 'journal-title': 'Rev. Environ. Health'}
/ Rev. Environ. Health / Oxides of nitrogen and their impact upon vegetation by Rowland A. (1985)10.1016/0269-7491(89)90172-3
10.1007/BF00033165
10.1111/j.1365-3040.1989.tb01630.x
10.1016/0003-9861(87)90591-1
Dates
Type | When |
---|---|
Created | 19 years, 4 months ago (May 1, 2006, 1:02 a.m.) |
Deposited | 1 year, 10 months ago (Oct. 24, 2023, 11:51 p.m.) |
Indexed | 4 weeks, 1 day ago (Aug. 6, 2025, 9:14 a.m.) |
Issued | 32 years, 1 month ago (Aug. 1, 1993) |
Published | 32 years, 1 month ago (Aug. 1, 1993) |
Published Online | 19 years, 4 months ago (April 28, 2006) |
Published Print | 32 years, 1 month ago (Aug. 1, 1993) |
@article{Streb_1993, title={Preferential photoinactivation of catalase and photoinhibition of photosystem II are common early symptoms under various osmotic and chemical stress conditions}, volume={88}, ISSN={1399-3054}, url={http://dx.doi.org/10.1111/j.1399-3054.1993.tb01376.x}, DOI={10.1111/j.1399-3054.1993.tb01376.x}, number={4}, journal={Physiologia Plantarum}, publisher={Wiley}, author={Streb, Peter and Michael‐Knauf, Andrea and Feierabend, Jürgen}, year={1993}, month=aug, pages={590–598} }