Muhammad Awais GHANİ, Amina MUSHTAQ, Khurram ZİAF, Basharat ALİ, Muhammad Muzammil JAHANGİR, Rashad Waseem KHAN, İmran KHAN, Muhammad AZAM, Anam NOOR

Exogenously Applied GA3 Promotes Plant Growth in Onion by Reducing Oxidative Stress Under Saline Conditions

ISSN: 1300-7580
Yayın Aralığı: Yılda 4 Sayı
Başlangıç: 1995
Yayıncı: Ankara Üniversitesi

Onion (Allium cepa L.) is a biennial crop of high commercial value in Pakistan. Onion is considered as salt sensitive plant species. The present investigation was carried out to investigate the effect of salinity on onion and its alleviation through exogenously applied gibberellic acid (GA3; 100 mg L-1). Foliar application of GA3 (100 mg L-1) was applied on onion seedlings grown under three levels (0, 2 or 4 dS m-1) of salinity after 45 days of sowing. Results revealed that growth parameters and total soluble protein (TSP) contents declined with increase in soil salinity level. While, antioxidant enzyme activities (CAT, SOD and POD) were increased with salinity. However, exogenously applied GA3 significantly enhanced the plant growth and TSP in onion seedlings. Interestingly, CAT, SOD and POD concentration decreased with GA3 application which depicts stress alleviation in saline stressed onion plants due to GA3. It was concluded that the growth of onion could be enhanced to some extent by the application of GA3 under salinity stress.

Keywords:

Allium cepa, PGRs, Saline stress, Antioxidative response, Yield,

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Weijun Zhou, PhDProfessor, Zhejiang Universitywjzhou@zju.edu.cnHe has lot of experience in plant stress
Shafaqt Ali, PhDAssociate Professor, Government College University Faisalabadshafaqataligill@yahoo.comHe has lot of experience on salt stress crop
Rafaqat Ali, PhDAssociate Professor, Wuhan Branch National Science Library Chinese Academy ofSciencesrafaqatalipbg@yahoo.comHe has experience in plant stress