Leaves are always positively phototropic . 叶子总是正向光性的。
2.
In recent years many organic dyes such as fluorescence dyes , laser dyes , nonlinear optical dyes and phototropic dyes were inducted into the inorganic matrix or ormosils 各种荧光染料、激光染料、 nlo染料及光致变色染料等相继被引入到无机基质或有机改性硅酸盐中。
3.
On the one hand , quercetin promotes hypocqtyls phototropic growth , on the other hand , it promotes gravitropism of root tips . when the seedlings are placed tilted at 80 , quercetin induces root tips getting into medium , while on control case , it grows along the surface 一方面q促进了下胚轴的向光生长，另一方面，促进了根尖的向地性，在80培养时， q诱导根尖钻入培养基中。
