Abstract Detail

Physiology

Dare, Olowolaju Ezekiel [1], Gideon, Okunlola Olarewaju [2], AJAyI, Adelusi Adekunle [3].

Effects of Prior Heat Stress on the Growth and Phytochemical Contents Accumulation of Amaranthus hybridus (Linn.).

This study aimed at investigating the effect of different durations of prior heat stress on growth and phytochemical contents accumulation in Amaranthus hybridus. The treatments were control without heat treatment, seedlings subjected to heat at 45^oC for two hours and seedlings subjected to heat at 45^oC for four hours. After the stipulated time for each category, they were both removed from the Gallenkamp oven and were transplanted into another sets of thirty six pots ( of 21cm deep and 24cm in diameter) with the control. The seedlings were kept in a screenhouse house to minimise extraneous factors such as pests and rodents, supply of water other than the amount specifically applied. They were watered daily with 200 mL of tap water in the morning and 200 mL of tap water in the evening until they were fully established. The phytochemical contents were determined at vegetative, fruiting and flowering stage using ethanolic extracts from the dried leaves of plant samples. The results obtained showed that there was significant difference in the morphological parameters such as leaf fresh and dry weights, shoot fresh and dry weights and root fresh and dry weights and the plants stressed for 4 hours was significantly lower in these parameters to other treatments at P<0.05. Exposure of the plants to heat at early stage at different durations enhanced the quantities of tannins , flavonoids, saponins and alkaloids at different growth stages. From this study it can be concluded that heat enhanced the production of some morphological parameters such as leaf fresh and dry weights, shoot fresh and dry weights and root fresh and dry weights. Higher quantities of Tannins, flavonoids, saponins and alkaloids can be obtained in Amaranthus hybridus at different stages of growth, by exposing the plants to heat at early stage of growth.

1 - Obafemi Awolowo University, Botany Department, ILE IFE, ILE IFE, OSUN, 23434, NIGERIA
2 - Osun State University, Department of Biological Sciences, OSOGBO, OSOGBO, OSUN, 23434, Nigeria
3 - Obafemi Awolowo University, ILE IFE, ILE IFE, OSUN, 23434, Nigeria

Keywords:
Biochemical
Early Stage
Growth
Heat
Stress
Phytochemicals.

Presentation Type: Oral Paper
Session: 44, Physiology
Location: 114/Mayo Civic Center
Date: Wednesday, July 25th, 2018
Time: 3:45 PM
Number: 44009
Abstract ID:178
Candidate for Awards:None