Investigating the Allelotoxic Activity of Eucalyptus rostrata Schlecht. on Seed Germination and Seedling Growth of Chenopodium album L. and Portulaca oleracea L. | Chapter 11 | New Visions in Biological Science Vol. 6

 A range of allelopathic compounds have been found in Eucalyptus rostrata. Two noxious weeds, Chenopodium album and Portulaca oleracea, were studied for their allelopathic effect of Eucalyptus rostrata leaf (ERLAE) and bark (ERBAE) aqueous extracts on seed germination and seedling growth. Depending on the extract type and recipient species, the biological action of the two types of extracts on germination efficiency differs. The extracts had the following effect on the two weeds: ERLAE > ERBAE, and the action in C. album was practically as effective and substantial as it was in P. oleracea. The current study's findings suggest that the presence of allelochemicals in the aqueous extracts causes a slower rate of cell division and elongation, which results in shorter plumule and radical lengths. Finally, the findings of this study may help to solve the problem of excessive use of synthetic herbicides by applying and testing a variety of promising medicinal plants rich in allelochemicals, such as E. rostrata.

Author(S) Details

H. M. Abou-Zeid
Department of Botany and Microbiology, Faculty of science, Alexandria University, Alexandria, Egypt.

S. M. EL-Darier
Department of Botany and Microbiology, Faculty of science, Alexandria University, Alexandria, Egypt.

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Effect of Light Colour Spectrum from Different Sources on Crop Growth and Phytochemical Properties: With Special Reference to Tomato (Solanum lycopersicum L.) under Colour Shading | Chapter 5 | Cutting-edge Research in Agricultural Sciences Vol. 9

 Different light wavelengths are associated with different functions in plant development. To detect these wavelengths, plants have a variety of photoreceptors. The changes in the light quality (wavelength) influences various physiological processes such as intra and inter-cellular differentiation, Different sources of light seem to be affected differently on different growth stages of plants. Some examples of light-emitting diode (LED) color spectrum, fluorescent tube light, high intensity discharge (HID) lamps, and transparent shading are examples of light-emitting diode (LED) color spectrum, fluorescent tube light, high intensity discharge (HID) lamps, and transparent shading. Experiments in which Experiments on seed germination of various plants under various light colors revealed varying effects on germination. The seedling height of tomato varies greatly depending on the color of the transparent shading. Under yellow, green, and colorless lighting, the ascorbic acid content of tomato fruit is significantly higher. We believe that green and red shading on tomato plants is more important than direct high intensity light for healthy lycopene-rich fruit production. Pericarp thickness, which is important for postharvest life and is one of the most valuable characteristics of fruit, was significantly higher under green shading.

Author(s) Details

Dr. P. K. Dissanayake
Faculty of Agricultural Sciences, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka

Ms. W. G. C. Wekumbura
Faculty of Agricultural Sciences, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka.

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