Amir Ghaffar Shahriari - Department of Agriculture and Natural Resources Higher Education Center of Eghlid Eghlid, Iran
Mehdi Zarei - Department of Soil Science, School of Agriculture Shiraz University & Department of Agriculture and Natural Resources Higher Education Center of EghlidEghlid, Iran
Roohollah Shamloo-Dashtpagerdi - Department of Agriculture and Natural Resources Higher Education Center of Eghlid Eghlid, Iran
Afsaneh Mohkami - Research and technology institute of plant production Shahid Bahonar University Kerman, Iran
Maziar Habibi-Pirkoohi - Zist Pajoohan Baran, Afzalipour Incubator Shahid Bahonar University Kerman, Iran
Aminallah Tahmasebi - Department of Agriculture Minab Higher Education Center University of Hormozgan Bandar Abbas, Iran

Tomato is one of the most important food and economic products in Iran and around the world. Tomatoesneed plenty of water to grow well and are severely affected by drought stress. Due to the reports of the positive effectof seaweed extract on increasing plant resistance to abiotic stresses, the present study was conducted to evaluate theeffect of Sargassum angustifolium seaweed extract on lycopene content under drought stress. This factorial studyincludes two factors, algae extract at three levels (zero, ۰.۵ and ۱ g / l) and drought stress at three levels (normal ornon-stress, FC = ۶۰% and FC = ۴۰%) with three Repeat performed. Lycopene concentration was measured toevaluate the effect of algae extract on tomatoes under drought stress. Based on the obtained results, it was found thatthe treatment of seaweed extract significantly improved lycopene in the tomato plant. The best results were obtainedin terms of morphological and physiological characteristics in the treatment of one gram / liter of seaweed extract.

Seaweed, drought stress, tomatoes, lycopene