Document Type : Original Article

Authors

• Fatemeh Baniasadi ¹
• Vahid Reza Saffari ²
• Ali Akbar Maghsoudi moud ²

¹ M.Sc. Student, Department of Horticultural, Shahid Bahonar University of Kerman, Kerman, Iran

² Associate Professor, Horticultural Institute, Shahid Bahonar University of Kerman, Kerman, Iran

Abstract

This study was carried out to investigate the effects of salinity and putrescine on pot­ marigold at four salinity levels applied by sodium chloride with electrical conductivities (EC) adjusted at 1, 3, 6 and 9 dS/m and putrescine sprayed at 0, 1 and 2 mmol in a factorial experiment based on completely randomized design (CRD) with three replications in greenhouse conditions. Traits studied were average stomatal length on abaxial and adaxial sides of leaf, relative water content, chlorophyll index, minimum and maximum florescence (F₀ and Fm respectively) and photosystem II quantum yield (Fv /Fm). ANOVA results showed that salinity stress had significant effects on all mentioned characteristics, so that all characteristics were reduced by increasing salinity levels except F₀ and F_m. Salinity reduced chlorophyll index, quantum yield and average stomatal length on both leaf sides up to 30%, 27.3%, 5%, 23%, 22.5%, respectively. Moreover, putrescine reduced these negative effects of salinity on some parameters such as chlorophyll index and quantum yield. Putrescine also reduced the length of stomata.

Keywords

• Polyamine
• Quantum yield
• Stomata
• chlorophyll
• RWC