Research On The Catalpa Bungei Yu Qiu No.1 Cuttage Seedling Vegetative Organ Anatomical Structure And The Formation Of Its Callus

Catalpa bungei C.A.Mey. is the defoliate tree which originates from china,a precious wood and gardening omamental tree in china,is called"the kingdom of wood". The Catalpa bungei Yu Qiu No.1 has three great characteristics :the precious high quality timber, the garden greeningt, the fast-growing three. This variety bark smooth, does not crack, the leaf blade color is Paris green, the garden greening on effect is good, and reduces the traditional Catalpa bungei 's rotation enormously. Many scholars as Liang Youwang, Dong Julan and so on through factors as phytohormone, variety, cuttage time, take root to the Catalpa bungei cuttage to conduct the research..This research takes Catalpa bungei improved variety Yu Qiu No.1 the yearling flat stubble seeding stem as plants the strip, experiments in the greenhouse of Henan Academy of Foresty, Zhengzhou,to carry on the heat preservati,on moisturizer, accelerating gemination. Pulls out layer and outside the greenhouse take the warm awning in the annual branch as cuttings, (1:2) mixes after the 500mg/L IBA and NAA matches the solution fast dips processing the cuttage. Take materials (stem root blade) from the cuttage, every 5 day.selection one time uses FAA to fix. To the cuttage seedling's stem, the leaf, the root as well as callus to carry on the paraffin section, Observe its vegetative organ's anatomical structure, callus structure and root type, the root primordium production time and the adventitious root development process. The possible mechanism which Catalpa bungei Yu Qiu No.1 the stem dissection structure to takes root the influence which and the adventitious root occurs from anatomy angle proving, provides anatomy basis as the variety's cultivation and the cuttage propagation.The paraffin section observations indicate:1. Catalpa bungei Yu Qiu No.1's root has the typical root anatomical structure, which has epidermis ,cortex and stele three parts.2. Catalpa bungei Yu Qiu No.1's stem has the typical stem anatomical structure, which has epidermis ,cortex ,vascular and marrow four parts.Cuttings has no first root primordium. In the stem's primary structure, bundle sheath has the phloem fiber and the phloem parenchyma cells in interphase annular arrangement, the cortex has not the continual sclerenchymatous cell.3. Catalpa bungei Yu Qiu No.1 leaf's anatomical structure has epidermis, mesophyll and vein. the typical bifacial leaf . which has Palisade tissue and Spongy tissue's differentiation.4. Catalpa bungei Yu Qiu No.1 the adventitious root primordium from the cerebral cortex parenchyma cells and the vascular bundle cells. the root primordium cells further splits, the differentiation to form the adventitious root.5. Catalpa bungei Yu Qiu No.1 cutting rooting is induced root primordium, on the anatomical structure factor, It belongs to the cuttage easily to take root the type tree species.