To study the leaf variation and morphological diversity of Phoebe bournei,the leaves of two leaf types and one wild type in the same growth environment,which were marked as Type A,B,and C with wild type being marked a...To study the leaf variation and morphological diversity of Phoebe bournei,the leaves of two leaf types and one wild type in the same growth environment,which were marked as Type A,B,and C with wild type being marked as B,were used as testing materials.40 healthy mature leaves collected from healthy plants were taken as research samples and phenotypic characteristics,such as leaf shape,leaf length,leaf width,leaf area,and leaf vein were observed and analyzed.The leaves of Type A were oblanceolate,the base of the leaves was gradually narrow,and the tip of the leaves was gradually sharp.There were white pubescences on the back of the leaves,which were arranged in order.The pubescences were evenly distributed on the mesophyll and vein,in the same direction.The length,width,perimeter,and area of the leaves were smaller than those of the other two types.The leaves of Type B were narrow,oblanceolate,wedge-shaped at the base,long acuminate at the tip,with yellow brown villi on the back of the leaves,mainly distributed along the vein and the grid vein between the veins;the villi on the main veins were longer,and the villi between the mesophylls were less numerous and shorter.The length,perimeter,and aspect ratio of the blade were the largest of the three types and the whole blade was slender.Type C leaves were elliptical with a nearly truncated base and a sharp tip.There were white pubescences on the back of the leaves and less mesophyll pubescence along the veins.The length-width ratio of the blade was small,the width was large,and the whole blade was round.There were significant differences among the three leaf types of P.bournei and preliminary judgement was that Type A and Type C were spontaneous mutants.展开更多
文摘To study the leaf variation and morphological diversity of Phoebe bournei,the leaves of two leaf types and one wild type in the same growth environment,which were marked as Type A,B,and C with wild type being marked as B,were used as testing materials.40 healthy mature leaves collected from healthy plants were taken as research samples and phenotypic characteristics,such as leaf shape,leaf length,leaf width,leaf area,and leaf vein were observed and analyzed.The leaves of Type A were oblanceolate,the base of the leaves was gradually narrow,and the tip of the leaves was gradually sharp.There were white pubescences on the back of the leaves,which were arranged in order.The pubescences were evenly distributed on the mesophyll and vein,in the same direction.The length,width,perimeter,and area of the leaves were smaller than those of the other two types.The leaves of Type B were narrow,oblanceolate,wedge-shaped at the base,long acuminate at the tip,with yellow brown villi on the back of the leaves,mainly distributed along the vein and the grid vein between the veins;the villi on the main veins were longer,and the villi between the mesophylls were less numerous and shorter.The length,perimeter,and aspect ratio of the blade were the largest of the three types and the whole blade was slender.Type C leaves were elliptical with a nearly truncated base and a sharp tip.There were white pubescences on the back of the leaves and less mesophyll pubescence along the veins.The length-width ratio of the blade was small,the width was large,and the whole blade was round.There were significant differences among the three leaf types of P.bournei and preliminary judgement was that Type A and Type C were spontaneous mutants.
