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Growth and Flowering Response of Marigold (Tagetes erecta) to Salt Stress

Growth and Flowering Response of Marigold (Tagetes erecta) to Salt Stress

Muzamil Farooque Jamali1, Fayaz Ali Jamali1, Tanveer Fatima Miano1, Zulfiqar Ali Abbasi2, Sohail Ahmed Otho3, Khalid Hussain Talpur4, Niaz Ahmed Wahocho1 and Muhammad Iqbal Jakhro5*

1Department of Horticulture, Sindh Agriculture University Tandojam, Pakistan; 2Department of Agronomy, Sindh Agriculture University Tandojam, Pakistan; 3Department of Entomology, Sindh Agriculture University Tandojam, Pakistan; 4Department of Soil Science, Sindh Agriculture University Tandojam, Pakistan; 5PARC-Balochistan Agricultural research and Development Centre Quetta, Balochistan, Pakistan.

 
*Correspondence | Muhammad Iqbal Jakhro, PARC-Balochistan Agricultural research and Development Centre Quetta, Balochistan, Pakistan; Email: iqbal.jakhro@gmail.com

ABSTRACT

Salt stress is major concerns to agriculture globally. Salt stress interferes enzymatic activities and several physiological processes that lead to reduction in crop yield and quality. The current investigation was performed at Horticulture Garden where two marigold cultivars (V1 = African orange and V2= Dwarf double mix) were subjected to salinity stress condition (0, 2, 4, 6 and 8 dS m-1). The results exhibited that salt stress revealed adverse effect on all the parameters of both of the varieties of marigold. The plants irrigated with canal water (control) having EC of 0.7 dSm-1 showed better results for both seed and flowering related traits. The plants treated with canal water showed better seed germination (82.56 %), seed germination index (2.04), plant height (21.31 cm), branches/plant (45.61), leaves/plant (201.67), flowers/plant (8.56), diameter of flower (7.95 cm), fresh root biomass (0.821 g) and dry root biomass (2.28 mg). The plants treated with 2 dSm-1 showed seed germination (65.35 %), seed germination index (1.53), plant height (16.61cm), branches/plant (40.38), leaves/plant (195.33), flowers/plant (6.83), diameter of flower (6.75 cm), fresh root biomass (0.718 g) and dry root biomass (2.04 mg). It was further noted that as the salt stress increases the plant performance for all investigated traits decreased significantly. The varieties showed highly different responses for both seed and flowering related attributes. The variety dwarf double mix had a better seed germination and flowering growth and production in comparison with African orange. The double mix showed better seed germination (64.64 %), seed germination index (1.53), plant height (14.94 cm), branches/plant (36.71), leaves/plant (190.73), flowers/plant (5.64), diameter of flower (6.32 cm), fresh root biomass (0.660 g) and dry root biomass (2.12 mg). It is concluded that salt stress up to 0.7 dSm-1 did not reveal any adverse effects on germination and flowering response of marigold. The salinity at 2, 6 and 8 dSm-1 caused simultaneous adverse effects on all the studied parameters.
 

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Pakistan Journal of Zoology

October

Vol. 53, Iss. 5, Pages 1603-2000

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