TY - JOUR
T1 - Modulation of growth, photosynthetic capacity and water relations in salt stressed wheat plants by exogenously applied 24-epibrassinolide
AU - Ali, Qasim
AU - Athar, Habib Ur Rehman
AU - Ashraf, M.
N1 - 01676903 (ISSN) Cited By (since 1996): 15 Export Date: 27 March 2012 Source: Scopus CODEN: PGRED doi: 10.1007/s10725-008-9290-7 Language of Original Document: English Correspondence Address: Ashraf, M.; Department of Botany, University of Agriculture, Faisalabad 38040, Pakistan; email: [email protected] References: Ali, B., Hayat, S., Ahmad, A., 28-Homobrassinolide ameliorates the saline stress in chickpea (Cicer arietinum L.) (2007) Environ Exp Bot, 59, pp. 217-223. , 10.1016/j.envexpbot.2005.12.002; Amzallag, G.N., Brassinosteroids and metahormones: Evidence for their specific influence during critical period in sorghum development (2002) Plant Biol, 4, pp. 656-663. , 10.1055/s-2002-37397; Anuradha, S., Rao, S.S.R., Applications of brassinosteroids to rice seeds (Oryza sativa L.) reduce the impact of salt stress on growth, prevented photosynthetic pigment loss and increased nitrate reductase activity (2003) Plant Growth Regul, 40, pp. 29-32. , 10.1023/A:1023080720374; Arnon, D.T., Copper enzyme in isolated chloroplasts, polyphenaloxidase in Beta vulgaris (1949) Plant Physiol, 24, pp. 1-15; Ashraf, M., Relationships between growth and gas exchange characteristics in some salt-tolerant amphidiploid Brassica species in relation to their diploid parents (2001) Environ Exp Bot, 45, pp. 155-163. , 10.1016/S0098-8472(00)00090-3; Ashraf, M., Relationships between leaf gas exchange characteristics and growth of differently adapted populations of Blue panic grass (Panicum antidotale Retz) under salinity or waterlogging (2003) Plant Sci, 165, pp. 69-75. , 10.1016/S0168-9452(03)00128-6; Ashraf, M., Some important physiological selection criteria for salt tolerance in plants (2004) Flora, 199, pp. 361-376; Baker, N.R., A possible role for photosystem II in environmental perturbations of photosynthesis (1991) Physiol Plant, 81, pp. 563-570. , 10.1111/j.1399-3054.1991.tb05101.x; Clouse, S.D., Sasse, J.M., Brassinoseroides essential regulators of plant growth and development (1998) Annu Rev Plant Physiol Plant Mol Biol, 49, pp. 427-451. , 10.1146/annurev.arplant.49.1.427; Dubey, R.S., Pessarakli, M., Photosynthesis in plants under stressful conditions (2005) Hand Book Photosynthesis, pp. 717-737. , 2 CRC Press, Taylor and Francis Group New York; Fariduddin, Q., Ahmad, A., Hayat, S., Photosynthetic response of vigna radiata to presowing seed treatment with 28-homobrassinolide (2003) Photosynthetica, 41, pp. 307-310. , 10.1023/B:PHOT.0000011968.78037.b1; Fujii, S., Saka, H., Distribution of assimilates to each organ in rice plants exposed to low temperature at the ripening stage and effect of brassinolide on the distribution (2001) Plant Prod Sci, 4, pp. 134-136; Goetz, M., Godt, D.E., Roitsch, T., Tissue-specific induction of the mRNA for an extra-cellular invertase isoenzyme of tomato by brassinosteroids suggests a role for steroid hormones in assimilate partitioning (2000) Plant J, 22, pp. 515-522. , 10.1046/j.1365-313x.2000.00766.x; Grieve, M.C., Scott, M.L., Francois, E.L., Mass, V.E., Analysis of main-spike yield components in salt-stressed wheat (1992) Crop Sci, 32, pp. 697-703; Haubrick, L.L., Assmann, S.M., Brassinosteroids and plant function: Some clues, more puzzles (2006) Plant Cell Environ, 29, pp. 446-457. , 10.1111/j.1365-3040.2005.01481.x; Hayat, S., Ahmad, A., Mobin, M., Hussain, A., Faridduddin, Q., Photosynthetic rate, growth and yield of mustard plants sprayed with 28-homobrassinolide (2000) Photosynthetica, 38, pp. 469-471. , 10.1023/A:1010954411302; Morillon, R., Catterou, M., Sangwan, R.S., Sangwan, B.S., Lassalles, J.P., Brassinolide may control aquaporin activities in Arabidopsis thaliana (2001) Planta, 212, pp. 199-204. , 10.1007/s004250000379; Munns, R., Genes and salt tolerance: Bringing them together (2005) New Phytol, 167, pp. 645-663; Mussig, C., Brassinosteroid-promoted growth (2005) Plant Biol, 7, pp. 110-117. , 10.1055/s-2005-837493; Nakajima, N., Toyama, S., Effects of epibrassinolide on sugar transport and allocation to the epicotyl in cucumber seedlings (1999) Plant Prod Sci, 2, pp. 165-171; Nátr, L., Lawlor, D.W., Pessarakli, M., Photosynthetic plant productivity (2005) Hand Book of Photosynthesis, pp. 501-524. , 2 CRC Press New York; Petzold, U., Peschel, S., Dahse, T., Adams, G., Stimulation of C14-sucrose export in Vicia faba plants by brassinosteroids, GA3 and IAA (1992) Acta Bot Neerl, 41, pp. 469-479; Raza, S.H., Athar, H.R., Ashraf, M., Influence of exogenously applied glycinebetaine on the photosynthetic capacity of two differently adapted wheat cultivars under salt stress (2006) Pak J Bot, 38, pp. 341-351. , 2; Robinson, S.P., Downton, W.J.S., Millhouse, J.A., Photosynthesis and ion content of leaves and isolated chloroplasts of salt-stressed spinach (1983) Plant Physiol, 73, pp. 238-242; Sakurai, A., Yokota, T., Clouse, S.D., (1999) Brassinosteroids. Steroidal Plant Hormones, , Springer Tokyo; Sasse, J.M., Recent progress in brassinosteroid research (1997) Physiol Plant, 100, pp. 696-701. , 10.1111/j.1399-3054.1997.tb03076.x; Shahbaz, M., Ashraf, M., Athar, H.R., Does exogenous application of 24-epibrassinolide ameliorate salt induced growth inhibition in wheat (Triticum aestivum L)? (2008) Plant Growth Regul, 55, pp. 51-64. , 10.1007/s10725-008-9262-y; Snedecor, G.W., Cochran, G.W., (1980) Stat Method, , 7 The Iowa State University Press Ames; Strasser, R.J., Srivastava, A., Govindjee, Polyphasic chlorophyll 'a' fluorescence transients in plants and cyanobaderia (1995) Photochem Photobiol, 61, pp. 32-42. , doi: 10.1111/j.1751-1097.1995.tb09240.x; Yu, J.Q., Huang, L.F., Hu, W.H., Zhou, Y.H., Mao, W.H., Ye, S.F., A role of brassinosteroid in regulation of photosynthesis in Cucumus sativus (2004) J Exp Bot, 55, pp. 135-1143. , 10.1093/jxb/erh124
PY - 2008/11
Y1 - 2008/11
N2 - Brassinosteroids promote the growth of plants and are effective in alleviating adverse effects of abiotic stresses such as salinity and drought. Under saline conditions, improvement in grain yield is more important than simple growth. Previously it was found that although foliar application of brassinosteroids improved growth of wheat plants, it did not increase grain yield. In present study, influence of root applied 24-epibrassinolide was assessed in improving growth and yield of two wheat cultivars. Plants of a salt tolerant (S-24) and a moderately salt sensitive (MH-97) were grown at 0 or 120 mM NaCl in continuously aerated Hoagland's nutrient solution. Different concentrations of 24-epibrassinolide (0, 0.052, 0.104, 0.156 μM) were also maintained in the solution culture. Exogenous application of 24-epibrassinolide counteracted the salt stress-induced growth and grain yield inhibition of both wheat cultivars. Of the varying 24-epibrassinolide concentrations used, the most effective concentrations for promoting growth were 0.104 and 0.052 μM under normal and saline conditions, respectively. However, root applied 0.052 μM 24-epibrassinolide enhanced the total grain yield and 100 grain weight of salt stressed plants of both cultivars and suggested that total grain yield was mainly increased by increase in grain size which might have been due to 24-epibrassinolide induced increase in translocation of more photoassimilates towards grain. Growth improvement in both cultivars due to root applied 24-epibrassinolide was found to be associated with improved photosynthetic capacity. Changes in photosynthetic rate due to 24-epibrassinolide application were found to be associated with non-stomatal limitations, other than photochemical efficiency of PSII and photosynthetic pigments. Leaf turgor potential found not to be involved in growth promotion. © 2008 Springer Science+Business Media B.V.
AB - Brassinosteroids promote the growth of plants and are effective in alleviating adverse effects of abiotic stresses such as salinity and drought. Under saline conditions, improvement in grain yield is more important than simple growth. Previously it was found that although foliar application of brassinosteroids improved growth of wheat plants, it did not increase grain yield. In present study, influence of root applied 24-epibrassinolide was assessed in improving growth and yield of two wheat cultivars. Plants of a salt tolerant (S-24) and a moderately salt sensitive (MH-97) were grown at 0 or 120 mM NaCl in continuously aerated Hoagland's nutrient solution. Different concentrations of 24-epibrassinolide (0, 0.052, 0.104, 0.156 μM) were also maintained in the solution culture. Exogenous application of 24-epibrassinolide counteracted the salt stress-induced growth and grain yield inhibition of both wheat cultivars. Of the varying 24-epibrassinolide concentrations used, the most effective concentrations for promoting growth were 0.104 and 0.052 μM under normal and saline conditions, respectively. However, root applied 0.052 μM 24-epibrassinolide enhanced the total grain yield and 100 grain weight of salt stressed plants of both cultivars and suggested that total grain yield was mainly increased by increase in grain size which might have been due to 24-epibrassinolide induced increase in translocation of more photoassimilates towards grain. Growth improvement in both cultivars due to root applied 24-epibrassinolide was found to be associated with improved photosynthetic capacity. Changes in photosynthetic rate due to 24-epibrassinolide application were found to be associated with non-stomatal limitations, other than photochemical efficiency of PSII and photosynthetic pigments. Leaf turgor potential found not to be involved in growth promotion. © 2008 Springer Science+Business Media B.V.
KW - Brassinosteroid
KW - Gas exchange
KW - Growth
KW - Photochemical efficiency
KW - Triticum aestivum
U2 - 10.1007/s10725-008-9290-7
DO - 10.1007/s10725-008-9290-7
M3 - Article
SN - 0167-6903
VL - 56
SP - 107
EP - 116
JO - Plant Growth Regulation
JF - Plant Growth Regulation
IS - 2
ER -