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Babak Andalibi

Fatemeh Heidari , Farid Shekari  , Babak Andalibi  , Jalal Saba , Daniela Uberti  and Andrea Mastinu
Comparative Effects of Four Plant Growth Regulators on Yield and Field Performance of Crocus sativus L.
Abstract


The effects of four plant growth regulators on Crocus sativus L. (saffron) yield and performance were studied in two consecutive years under field conditions. Saffron corms were immersed in solutions of gibberellic acid (GA3 ), salicylic acid (SA), paclobutrazol (PBZ), chlormequat chloride (CCC), distilled water (hydroprime), and dry corms as the control. Results showed that among the different treatments, plants primed with GA3 500 µM had the highest flower fresh weight and stigma dry weight. In contrast, primed corms with 1000 µM CCC and 100 µM PBZ had the lowest flower dry weight. Furthermore, the plants primed with SA 1400 had the highest leaf numbers, leaf dry weight, and leaf area index (LAI). Plants treated with GA3 induced narrow but the longest leaves, while those treated with SA showed the widest ones. It was also demonstrated that the application of CCC and PBZ can produce shorter leaves. Furthermore, the greatest numbers of daughter corms were obtained in 1400 µM SA. Both PBZ and CCC were reported to have no impacts on the corm numbers but produced larger and heavier daughter corms. The results revealed that the priming of saffron corms with GA3 and then SA improved saffron growth and yield. Keywords: chlormequat chloride; Crocus sativus L.; gibberellic acid; paclobutrazol; priming; salicylic acid; stigma yield

 

 

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