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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 22, No. 4, 2018, pp. 535-540
Bioline Code: ja18096
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 22, No. 4, 2018, pp. 535-540

 en Influence of Salicylic Acid on the Growth of Lettuce ( Lactuca sativa check for this species in other resources var longifolia) During Reduced Leaf Water Potential


Salicylic acid (SA) a signal molecule which is responsible for inducing defense mechanisms in plants and also has a protective role in stress sensitivity. A study was conducted to determine the effect of water deficit stress on the growth of Lactuca sativa L. (Lettuce) using SA (1 mM and 3 mM) during reduced leaf water potential. Plants were subjected to 7 days drought after four weeks of growth. Stressed plants exhibited a lower leaf water potential (ψw) of -0.499 MPa as compared with the control (ψw of -0.460 MPa). Plants with lower leaf ψw exhibited reduction in almost all the parameters studied: 1 mM SA foliar treatment caused increase of 8 % in plant height and 53.16 % in plant biomass. Foliar treatment of 3 mM SA of the relative water content stimulated 13 % increase in the growth as compared to the control plant which was statistically significant at P<0.05. Overall, SA in stressed plant exhibited higher ameliorative capacity which has the beneficial role of mediating defense response in plants under stress.

Water stress; Salicylic acid; Growth; Lactuca sativa

© Copyright 2018 - Bankole et al.

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