新高梨果实的生长发育特性

为了了解新高梨果实的生育特性,以从日本引进的新高梨为材料,通过田间调查和石蜡切片对新高梨果实的生长发育进行了系统的观测分析。结果表明:果实纵横径的生长经历了3个阶段,3个增长高峰期。体积和重量的增长经历了2个阶段,2个增长高峰期。果实膨大在6月中旬之前主要是由于细胞分裂,细胞数目的增多,之后主要是由于细胞体积的增大。石细胞是由薄壁细胞转化而来的,转化的顺序是从果肉内部逐渐向外。胚在花后2周开始发育,2个月后基本发育成熟。

Growth and Development Characteristics of Fruit in Niitaka Pear

Growth and development characteristics of fruit in Niitaka pear were observed and analyzed systematacially by field survey and paraffin section technique. The results showed that the increase of fruit transverse and lengthways diameters experienced 3 fast growth stages and had 3 peaks, and the increase of fruit bulk and weight experienced 2 fast growth stages and had 2 peaks. Fruit growth was attributed to cell division, cell number increase before the middle of June, and to growing of cell volume after that term. Stone cells were developed from parenchyma cells of fruit flesh from interior to exterior. Embryo began to development, after flowers had bloomed for 2 weeks, and it matured largely after 2 months.