Abstract Detail

Recent Topics Posters

Umebese, Caroline Emosioke [1], Ubajaka, Somtochukwu [2], Asekun, Olayinka [3].

Light intensity alters the growth and quality of volatile components from hexane extracts of Hyptis suaveolens (Family Lamiaceae), a medicinal plant.

The impact of light intensity on plant growth and hexane extracts of the leaves of Hyptis suaveolens, was investigated. Plants were subjected to full sunlight (FS, 58753 lux), medium light intensity (MLI, 35880 lux) and low light intensity (LLI, 1250 lux) and were grown in loamy soil for 16 weeks. The parameters investigated include plant height, leaf area, shoot dry weight, root dry weight, number of leaves, stem girth, Net Assimilation Rate (NAR), Leaf Area Ratio (LAR), Relative Growth Rate (RGR) and the type and amount of volatile components from hexane extract present in the leaves, using GC-MS. There were mostly slight differences in the growth parameters but consistently the plants subjected to FS showed highest parameters followed by those subjected to MLI. The dry weight of roots of LLI plants, were significantly lower than the other treatments. Though there were only slight differences between the growth parameters of plants subjected to different light intensities, the type and quantity of volatile compounds varied markedly. Volatile compounds like Ar-Abietatriene and 1-Phenanthrenemethanol were present under the three varying light intensities while 3 compounds were present in plants subjected to only FS. Nine compounds were found to be unique to LLI plants and 5 were found in plants subjected to MLI condition. Furthermore, LLI induced the highest concentration of 1-Phenanthrenemethanol than the other treatments, while FS induced the highest concentration of Ar-Abietatriene. However, Sesquirosefuran was enhanced in hexane extract of FS. Though full sunlight improved the growth of plants, the number of volatile compounds increased with decreasing light intensity from 7 to 12 compounds in the hexane extracts. This research points to the fact that low light intensity alters the volatile compounds of Hyptis suaveolens markedly and this could affect its antimicrobial activity.

1 - University Of Lagos, Department Of Botany, Akoka-Yaba, Lagos, Nigeria, Lagos State, N/A, 23401, Nigeria
2 - University of Lagos, Botany, Akoka-Yaba, Lagos, N/A, 23401, Nigeria
3 - University of Lagos, Chemistry, Akoka-Yaba, Lagos, Lagos, 23401, Nigeria

Keywords:
Hexane extract
volatile compounds
plant growth
light intensity
Hyptis suaveolens.

Presentation Type: Recent Topics Poster
Session: P, Recent Topics Posters
Location: Exhibit Hall/Omni Hotel
Date: Monday, June 26th, 2017
Time: 5:30 PM
Number: PRT001
Abstract ID:22
Candidate for Awards:None