Effect of different green shade net houses on growth and biochemical components of various Ocimum spp.
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Date
2020
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Punjab Agricultural University, Ludhiana
Abstract
The effect of different green shade net houses on the growth and biochemical constituents
were recorded during the present investigation on four different Ocimum spp. (O. tenuiflorum,
O. sanctum, O. basilicum and O. gratissimum). The plants were grown under five different
shading intensities viz- 35%, 50%, 75%, 90% and open (no net condition) as control. Growth
parameters like number of branches, number of leaves, total fresh weight, total dry weight,
leaf dry weight, shoot dry weight were recorded to be higher in 35% shading intensity than
control and other shading intensities whereas stem diameter and root length were higher in
control in comparison to other shading intensities. However, parameters like plant height,
internodal length and leaf area were recorded higher in 90% shading intensity than in control.
All growth parameters except plant height, internodal length and leaf area were found to be
suppressed as the shading intensity was increased beyond 50%. The requirement of moderate
light intensity for better growth and development has been reflected in maximum growth
parameters. Variable response was observed for biochemical parameters in different shading
intensities. However, the trend was same for all species. Biochemical parameters like total
carotenoid content, total sugars, reducing and soluble protein were recorded maximum in
control i.e. under full sunlight followed closely by 35% shading intensity while 90% shading
intensity recorded highest chlorophyll a, chlorophyll b and total chlorophyll content. Total
phenols and flavonoids were recorded to be highest in control (no net conditions) followed
closely by 35% shading intensity while alkaloids and terpenoids were recorded to be highest
in 35% shading intensity followed closely by control. However, biochemical parameters were
influenced but phytochemical compounds like alkaloids and terpenoids recorded increase
under 35% shading intensity which contribute to its medicinal properties. Therefore, in
present investigation, Ocimum spp. performs better in 35% shading intensity than other
shading intensities and control.
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Citation
Aayushi (2020). Effect of different green shade net houses on growth and biochemical components of various Ocimum spp. (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.