The Reproductive Biology Of Six Kinds Plants Of Rosaceae

Rosaceae is Dicotyledoneae of higher economic value of a large branch. Many plants of Rosaceae which can be used for viewing in the garden of green around the world occupy an important position. In addition, some plants have medicinal value, the others are famous fruits, which are cultivated all over the world.Through the research on cutting reproduction and seed reproduction of Spiraea bumalda,Spiraea thunbergii,Rosa xanthina,Potentilla fruticosa.,Prunus tomentosa and Crataegus pinnatifida six kinds of Rosaceae, the comparative research of anatomy was conducted on cutting root processing and seed root processing by traditional paraffin sections technology,to find out its rooting rule and explore simple and convenient reproduction methods, which introduce and propagate the large-scale provision of technical information to meet the market demand is important practical significance. The results are as follows:1. The green shoot cutting of Six Rosaceae plants interact in the hormone type, concentration and immersion time, Potentilla fruticosa has the highest survivaling rate in the 50 mg / L ABT1 for 20 minutes to 93.33%, followed by Spiraea bumalda in 100mg / L ABT1 for 5 minutes to 91.67%,and 200 mg / L ABT1 for 10 minutes to 66.67% for Rosa xanthina, the 50 mg / L NAA for 5 minutes to 58.33% for Prunus tomentosa, 200 mg / L ABT1 for 10 minutes to 33.33% for Spiraea thunbergii, Rooting the hardest for Crataegus pinnatifida , no rooting cuttings 40 days;2. Six Rosaceae plants seed germination researches show that The Potentillafruticosa GA3 500ppm seeds at room temperature for 7 days after germination can reach the germination rate of up to 96.33%;This was followed by Prunus tomentosa cold stratification in the three months after GA3 300ppm handle up to 93.33% germination rate; Spiraea bumalda and Spiraea thunbergii at low temperature GA3 500ppm after 20 days after germination rates were 20.00% and 13.33%; Rosa xanthina cold stratification in the three months after germination rate of 13.00%, in the cold stratification Crataegus pinnatifida three months after germination rate remains at 0;3. In rooting time of six Rosaceae plants'green shoot cutting, the Potentilla fruticosa is the fastest for 20 days with the round-shaped arrangement of the skin; Crataegus pinnatifida produce callus for 40 days long and no roots; Spiraea bumalda and Spiraea thunbergii the rooting time are all for 30 days, rooting type is skin rooting, arrangement way is dispersing lives; Rosa xanthina is callus rooting, the rooting time is for 40 days, arrangement way is annular; Prunus tomentosa is for 30 days, rooting type is middle rooting,arrangement way is annular; 4. Six Rosaceae plants are all induced root priodmia, the form time of induced root priodmia is different, the external features characteristic and internal anatomical were corresponding. Spiraea bumalda and Spiraea thunbergii root priodmia are induced between vascular beam cell and cambium; Rosa xanthina is induced from callus, Potentilla fruticosa is induced from cambium, Prunus tomentosa is induced from callus or cambium;Crataegus pinnatifida callus is induced from cambium and parenchyma cell. The central cylinder of adventitious roots is different, Spiraea bumalda and Spiraea thunbergii are diarch, Rosa xanthina is triarch, Potentilla fruticosa is tetrarch, Prunus tomentosa is pentarch;5. Spiraea bumalda and Spiraea thunbergii and Potentilla fruticosa seed type is non endosperm, embryo goes straight, the root vascular cylinder is diarch; Rosa xanthina and Prunus tomentosa seed type is have endospern , embryo goes curving ,the root is tetrarch; Crataegus pinnatifida seed have endospern.