EFFECT OF SPRAYING WITH SPERMINE ON HEAT STRESS RELIEF IN SOME WHEAT CULTIVARS

ABSTRACT
The reaction of several bread wheat cultivars (Triticum aestivum L.) and spermine under new recovered sandy soil conditions was examined during the winters of 2021–22 and 2022–23 at Al-Dakhla –New Valley, Egypt. The experiment included 40 treatments, which were combinations of wheat cultivars Misr-1, Misr-2, Misr-3, Sakha-94, Sakha-1001, Sids14, Gemmeiza12 and Shandaweel1 and levels of spermine (0, 2, 4, 6 and 8 ml/ha^-1). The findings showed notable variations in all examined features between wheat cultivars. The Sakha-94 cultivar greatly outperformed other cultivars in both seasons for grain yield/ha.  Wheat cultivar Misr-3 outperformed the others in terms of plant height and spike length. Sakha-1001 produced the No. of spike m-2. Application of either spermine 8 ml greatly improved all examined properties. The Sakha-94 wheat cultivar achieved the maximum grain yield (4190 kg/ha^-1 in the first season and 4295 kg/ha^-1 in the second one). However, this study recommends the importance of the Sakha-94 wheat cultivar with the application of Spermine 8 ml under Al-Dakhla –New Valley, conditions.