It is important to elucidate the growth and development characteristics and mechanism of drought tolerance in wheat for breeding cultivar and optimizing cultivation technology. Field experiments were conducted at Luoyang area using a new wheat cultivar Zhenghan 1 with good drought tolerance and Yumai 2 and Yumai 42 as control to synthetically study the effects of different drought conditions on wheat growth, yield formation and physiological characteristics in leaves and roots, and to investigte the toleran...