番茄种子及萌发过程中蛋白体超微结构的研究

THE ULTRASTRUCTURAL STUDY OF PROTEIN BODY IN UNGERMINATED AND GERMINATED TOMATO SEED

对番茄种子蛋白体的结构、类型及萌发过程中的变化进行了详细观察。未萌发种子蛋白体周围由一单层膜包裹、内部为蛋白质基质及分布其中的内含物３部分组成，根据内含物形态和性质上的不同可分为球状晶体、拟晶体和簇晶体３种形式。根据蛋白体所含内含物的不同，将蛋白体划分为５种基本类型：（１）基质蛋白体；（２）球状晶体蛋白体；（３）拟晶体蛋白体；（４）簇晶体蛋白体；（５）复合蛋白体。萌发过程中，蛋白体逐渐降解并液泡化，降解的方式表现为内部降解、内部和周边同时降解２种类型。

The protein body of ungerminated and germinated tomato seeds was studied in this paper.Protein body consists of a limited membrance,proteinaceous matrix and different types of inclusions:globoid crystals,protein crystalloids and druse crystals.According to the difference of inclusions,protein bodies are divided into five types:(1) only with proteinaceous matrix,without any inclusion;(2) only with gloid crystals in proteinaceous matrix;(3) protein body consists of protein crystalloids and protein matrix;(4) with druse crystal in protein matrix;(5) with gloid crystals and protein crystalloids without druse crystals in protein matrix.Protein body degradats and vacuolats gradually during germination.There are two degradative patterns of protein bodies:internal degra dation,both internal and peripheral degradation.The fundamental change of inclusions during germination is investigated.