Abstract
The effects of 0.1 μM 24-epibrassinolide (EBL) on plant growth (plant height, leaf area, fresh weight, and dry weight), chlorophyll content, photosynthetic characteristics, antioxidant enzymes, and chloroplast ultrastructure were investigated using cucumber seedlings (Cucumis sativus L. cv. Jinyou No. 4) with 80 mM Ca(NO3)2 to induce stress. The presence of Ca(NO3)2 caused significant reductions in net photosynthetic rate (P N), stomatal conductance (Gs), intercellular CO2 concentration (Ci), and transpiration rate (Tr) of leaves. In addition, Ca(NO3)2 markedly reduced the chlorophyll content and inhibited photochemical activity, including the actual photochemical efficiency (ΦPSII). In contrast, EBL increased the chlorophyll content, especially chlorophyll b, and minimized the harmful effects on photosynthesis caused by the Ca(NO3)2. The application of EBL to the plants subjected to Ca(NO3)2-enhanced photochemical activity. EBL protected the photosynthetic membrane system from oxidative damage due to up-regulating the capacity of the antioxidant systems. Microscopic analyses revealed that Ca(NO3)2 affected the structure of the photosynthetic apparatus and membrane system and induced damage of granal thylakoid layers, while EBL recovered the typical shape of chloroplasts and promoted the formation of grana. Taken together, EBL compensated for damage/losses by Ca(NO3)2 due to the regulation of photosynthetic characteristics and the antioxidant system.
Similar content being viewed by others
Abbreviations
- APX:
-
Ascorbate peroxidase
- BRs:
-
Brassinosteroids
- CAT:
-
Catalase
- Chl:
-
Chlorophyll
- EBL:
-
24-Epibrassinolide
- Fv/Fm:
-
Maximal quantum yield of PSII photochemistry
- GPX:
-
Guaiacol peroxidase
- LHC:
-
Light-harvesting complex
- PSI:
-
Photosystem I
- PSII:
-
Photosystem II
- ΦPSII:
-
The actual efficiency of PSII
- qN:
-
Non-photochemical quenching
- qP:
-
Coefficient for photochemical quenching
- ROS:
-
Reactive oxygen species
- SOD:
-
Superoxide dismutase
References
Aebi H (1984) Catalase in vitro. Method Enzymol 105:121–126. doi:10.1016/S0076-6879(84)05016-3
Ali B, Hayat S, Fariduddin Q, Ahmad A (2008a) 24-Epibrassinolide protects against the stress generated by saline and nickel in Brassica juncea. Chemosphere 72:1387–1392. doi:10.1016/j.chemosphere.2008.04.012
Ali Q, Athar HR, Ashraf M (2008b) Modulation of growth, photosynthetic capacity and water relations in salt stressed wheat plants by exogenously applied 24-epibrassinolide. Plant Growth Regul 56:107–116. doi:10.1007/s10725-008-9290-7
Ashraf M (1994) Breeding for salinity tolerance in plants. Crit Rev Plant Sci 13:17–42. doi:10.1080/07352689409701906
Elstner EF, Heupel A (1976) Inhibition of nitrate formation from hydroxylammonium chloride: a simple assay for superoxide dismutase. Anal Biochem 70:616–620
FAO (2012) FAO land and plant nutrition management service. http://www.fao.org/ag/agl/agll/spush
Foyer CH, Lelandais M, Kunert KJ (1994) Photooxidative stress in plants. Physiol Plantarum 92:696–717. doi:10.1111/j.1399-3054.1994.tb03042.x
Giannopolitis CN, Ries SK (1977) Superoxide dismutase in higher plants. Plant Physiol 59:309–314
Goda H, Shimada Y, Asami T, Fujioka S, Yoshida S (2002) Microarray analysis of brassinosteroid-regulated genes in Arabidopsis. Plant Physiol 130:1319–1334. doi:10.1104/pp.011254
Hayat S, Hasan SA, Yusuf M, Hayat Q, Ahmad A (2010) Effect of 28-homobrassinolide on photosynthesis, fluorescence and antioxidant system in the presence or absence of salinity and temperature in Vigna radiata. Environ Exp Bot 69:105–112. doi:10.1016/j.envexpbot.2010.03.004
Heath RL, Packer L (1968) Photoperoxidation in isolated chloroplasts: I. Kinetic and stoichiometry of fatty acid peroxidation. Arch Biochem Biophys 125:189–198. doi:10.1016/0003-9861(68)90654-1
Herzog V, Fahimi H (1973) Determination of the activity of peroxidase. Anal Biochem 55:554–562
Horn R, Grundmann G, Paulsen H (2007) Consecutive binding of chlorophylls a and b during the assembly in vitro of light-harvesting chlorophyll-a/b protein (LHCII b). J Mol Biol 366:1045–1054. doi:10.1016/j.jmb.2006.11.069
Houimli SM, Denden M, El Hadj SB (2008) Induction of salt tolerance in pepper (Capsicum annuum) by 24-epibrassinolide. Eur Asia J Bio Sci 2:83–90
Hu WH, Wu Y, Zeng JZ, He L, Zeng QM (2010) Chill-induced inhibition of photosynthesis was alleviated by 24-epibrassinolide pretreatment in cucumber during chilling and subsequent recovery. Photosynthetica 48(4):537–544. doi:10.1007/s11099-101-0071-y
Ioannidis NE, Kotzabasis K (2007) Effects of polyamines on the functionality of photosynthetic membrane in vivo and in vitro. Biochim Biophys Acta 1767:1372–1382. doi:10.1016/j.bbabio.2007.10.002
Janeczko A, Gullner G, Skoczowski A, Dubert F, Barna B (2007) Effect of brassinosteroid infiltration prior to cold treatment on ion leakage and pigment contents in rape leaves. Biol Plant 51:355–358. doi:10.1007/s10535-007-0072-2
Jin CY, Sun J, Guo SR (2010) Effects of exogenous spermidine on growth and active oxygen metabolism in cucumber seedlings under Ca(NO3)2 stress. Acta Bot Boreal 30(8):1627–1633
Kooten O, Snel J (1990) The use of chlorophyll fluorescence nomenclature in plant stress physiology. Photosynth Res 25:147–150. doi:10.1007/BF00033156
Lambers H, Chapin FS, Pons TL (2008) Plant water relations. In: Lambers H, Chapin FS, Pons TL (eds) Plant physiological ecology. Springer, New York, pp 163–223. doi:10.1007/978-0-387-78341-3_5
Li DP, Wu ZJ, Liang CH, Chen LJ (2004) Characteristics and regulation of greenhouse soil environment. Chin J Ecol 23:192–197
Liang YC, Si J, Nikolic M, Peng Y, Chen W, Jiang Y (2005) Organic manure stimulates biological activity and barley growth in soil subject to secondary salinization. Soil Biol Biochem 37:1185–1195. doi:10.1016/j.soilbio.2004.11.017
Mittler R (2002) Oxidative stress, antioxidants and stress tolerance. Trends Plant Sci 7:405–410. doi:10.1016/S1360-1385(02)02312-9
Nakano Y, Asada K (1981) Hydrogen peroxide is scavenged by ascorbate-specific peroxidase in spinach chloroplasts. Plant Cell Physiol 22:679–690
Ogweno JO, Song XS, Shi K, Hu WH, Mao WH, Zhou YH, Yu JQ, Nogues S (2008) Brassinosteroids alleviate heat-induced inhibition of photosynthesis by increasing carboxylation efficiency and enhancing antioxidant systems in Lycopersicon esculentum. J Plant Growth Regul 27:49–57. doi:10.1007/s00344-007-9030-7
Parida AK, Das AB, Mittra B (2003) Effects of NaCl stress on the structure, pigment complex composition, and photosynthetic activity of mangrove Bruguiera parvifolra chloroplasts. Photosynthetica 41:191–200. doi:10.1023/B:PHOT.0000011951.37231.69
Patterson BD, Macrae EA, Ferguson IB (1984) Estimation of hydrogen peroxide in plants extracts using titanium (IV). Ann Biochem 139(2):487–492. doi:10.1016/0003-2697(84)90039-3
Qayyum B, Shahbaz M, Akram NA (2007) Interactive effect of foliar application of 24-epibrassinolide and root zone salinity on morpho-physiological attributes of wheat (Triticum aestivum L.). Int J Agric Biol 9:584–589
Sam O, Ramírez C, Coronado MJ, Testillano PS, Risueño MC (2003) Changes in tomato leaves induced by NaCl stress: leaf organization and cell ultrastructure. Biol Plantarum 47:361–366. doi:10.1023/B:BIOP.0000023878.58899.88
Strain HH, Svec WA (1966) Extraction, separation, estimation and isolation of the chlorophylls. In: Vernon LP, Seeley GR (eds) The chlorophylls. Academic Press, New York, pp 21–66
Sun YD, Luo WR, Li XZ, Qi AG (2009) Effects of Ca(NO3)2 stress on the growth and physiological indexes of cucumber seedlings. Environ Sci Info Appl Technol 268–271. doi:10.1109/ESIAT.2009.110
Tong YW, Chen DF (1991) Study on the cause and control of secondary saline soils in greenhouse. Acta Hortic Sin 18:159–162
Wu XG (2001) Causes and preventive measures of salt accumulation on face soil in vegetable greenhouse. J Zhejiang Wanli Univ 14:19–21
Xia XJ, Huang YY, Wang L, Huang LF, Yu YL, Zhou YH, Yu JQ (2006) Pesticides-induced depression of photosynthesis was alleviated by 24-epibrassinolide pretreatment in Cucumis sativus L. Pest Biochem Phys 86:42–48. doi:10.1016/j.pestbp.2006.01.005
Xia XJ, Huang LF, Zhou YH, Mao WH, Shi K, Wu JX, Asami T, Chen ZX, Yu JQ (2009) Brassinosteroids promote photosynthesis and growth by enhancing activation of Rubisco and expression of photosynthetic genes in Cucumis sativus. Planta 230:1185–1196. doi:10.1007/s00425-009-1016-1
Yabuta Y, Motoki T, Yoshimura K, Takeda T, Ishikawa T, Shigeoka S (2002) Thylakoid membrane-bound ascorbate peroxidase is a limiting factor of antioxidative systems under photo-oxidative stress. Plant J 32:915–925. doi:10.1046/j.1365-313X.2002.01476.x
Yamane K, Kawasaki M, Taniguchi M, Miyake H (2003) Differential effect of NaCl and polyethylene glycol on the ultrastructure of chloroplasts in rice seedlings. J Plant Physiol 160:573–575. doi:10.1078/0176-1617-00948
Yu JQ, Huang LF, Hu WH, Zhou YH, Mao WH, Ye SF, Nogués S (2004) A role for brassinosteroids in the regulation of photosynthesis in Cucumis sativus. J Exp Bot 55:1135–1143. doi:10.1093/jxb/erh124
Yu HY, Li TX, Zhou JM (2005) Secondary salinization of greenhouse soil and its effects on soil properties. Soils 37(6):581–586
Zhang GW, Liu ZL, Zhou JG, Zhu YL (2008) Effects of Ca(NO3)2 stress on oxidative damage, antioxidant enzymes activities and polyamine contents in roots of grafted and non-grafted tomato plants. Plant Growth Regul 56:7–19. doi:10.1007/s10725-008-9281-8
Zhang RH, Li J, Guo SR, Tezuka T (2009) Effects of exogenous putrescine on gas-exchange characteristics and chlorophyll fluorescence of NaCl-stressed cucumber seedlings. Photosynth Res 100:155–162. doi:10.1007/s11120-009-9441-3
Acknowledgments
This work was funded by National Basic Research Program of China (973 334 Program, No. 2009CB119000), National Natural Science Foundation of China (No. 30900995; No. 335 31071831), and the Priority Academic Program Development of Jiangsu Higher Education Institutions 336 (PAPD), and supported by the China Earmarked Fund for Modern Agro-industry 337 Technology Research System (CARS-25-C-03).
Author information
Authors and Affiliations
Corresponding author
Additional information
Lingyun Yuan and Sheng Shu contributed equally to this paper.
Rights and permissions
About this article
Cite this article
Yuan, L., Shu, S., Sun, J. et al. Effects of 24-epibrassinolide on the photosynthetic characteristics, antioxidant system, and chloroplast ultrastructure in Cucumis sativus L. under Ca(NO3)2 stress. Photosynth Res 112, 205–214 (2012). https://doi.org/10.1007/s11120-012-9774-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11120-012-9774-1