Abstract

SOLARI, Mónica et al. Effects of methanol foliar applications on the growth and yield of lettuce (Lactuca sativa L.). Ecol. apl. [online]. 2004, vol.3, n.1-2, pp.29-34. ISSN 1726-2216.

Results obtained in previous studies suggested foliar incorporation of carbon coming from methanol. The objective of the present study was to determine the effects of foliar methanol application, on the growth and yield of an hydroponic culture of lettuce (Lactuca sativa L.). Methanol was used at percentages of 10, 20, 30, 40, 50, 60, 70 and 80. A control was also employed. Fresh weight, length of floral stem, and stomatal conductance were measured, and other pertinent observations were also registered. Seasonal changes, probably due to different growth rates and storage, influenced by variations in temperature and luminosity along the year, were also observed. These experiments revealed increments in root weight, but no foliar level weight increments were registered. Increments in the length of the floral stem related to methanol applications were also annotated. Effects on stomatal conductance were not conclusive.

Keywords : methanol; foliar applications; lettuce; roots; porometer; dose specific response.

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