Yuanfen Gao, Tinglan Jiang, Yin Xiang, Xuewu He, Zhen Zhang, Shengjuan Wen, Junjie Zhang^*

Phyton-International Journal of Experimental Botany, Vol.90, No.5, pp. 1465-1476, 2021, DOI:10.32604/phyton.2021.014811

Abstract Brassinosteroids participate in many physiological processes in plants; however, their regulatory roles on the activities of the enzymes involved in dark phase of photosynthesis remains elusive. In this study, detached leaves and protoplasts of maize seedlings were treated with epi-brassinolide (EBR) and brassinazole followed by the determination of the contents of chlorophyll (a+b) and soluble sugars, and the activity of dark reaction enzymes and the expression of the relevant genes. The results showed that chlorophyll (a+b) content increased by 7.4% under 0.1 μM EBR treatment for 48 h; furthermore, chlorophyll (a+b) content increased by 34% in detached leaves that were… More >

Naz N¹, F Durrani¹, Z Shah², NA Khan¹, I Ullah¹

Phyton-International Journal of Experimental Botany, Vol.87, pp. 225-230, 2018, DOI:10.32604/phyton.2018.87.225

Abstract The progress and development of crops like potato are harmfully affected by increased heat stress throughout the world. Stress caused by increased heat adversely affects germination and seedling growth which result in a reduced crop development and yield. The present research was carried out to know the influence of heat stress on growth indices and physiological processes of potato (Solanum tuberosum L.). The heat stresses C- Control (25 °C); T1-45 °C, and T2-40 °C were applied in separate growth chambers to the plants, after 25 days from their germination. Increased heat stress considerably decreased the chlorophyll a and b pigments… More >