Development of a robust hydroponic method for screening of sunflower (Helianthus annuus L.) accessions for tolerance to heat and osmotic stress oleh Muhammad Shehzad, Rao Samran Gul, Saeed Rauf, Wellington Ronildo Clarindo, Jameel Mohammed Al-Khayri, Muhammad Mubashar Hussain, Hassan Munir, Mehdi Ghaffari, Shahid Nazir, Majid Hussain