Effects of Intergeneric Grafting of Schisandraceae on Root Morphology, Anatomy and Physiology of Rootstocks

Kadsura coccinea (Lem.) A. C. Smith and Schisandra sphenantha rehd. et wils. are different genus plants of Schisandraceae, distributed in the north south China, respectively. These species non-wood forest trees with important medicinal value. Grafting is one technical means by which migrate to other regions adapt habitats. However, current research on grafting Schisandraceae only focuses effect rootstock scion, lacks investigations scion rootstock, leading mechanism rootstock–scion interaction being still unclear. In this study, (K) sphenanthera (S) were used as for reciprocal grafting, four grafted combinations, K/S (scion/rootstock), S/S, S/K, K/K, obtained, S/S K/K controls. Comparative analyses morphological, anatomical, physiological characteristics rootstocks conducted at 10 d, 30 50 70 d after grafting. The results showed that compared control, total root length, volume, tips, biomass S/K decreased. average diameter surface area increased, while those All differences between above indices control about 10%, almost all them changed most significantly Anatomically, cross section, stele diameter, xylem addition, cortex thicknesses increased. anatomical changes mainly reflected second-order third-order roots. Meanwhile, endogenous hormone (IAA, ZR, GA3, ABA) contents relation days could explain morphology. Moreover, both had lower activity soluble sugar content than protein higher malondialdehyde content. This study indicated intergeneric inhibited growth rootstocks, degree inhibition was potentially related relative strength provides a theoretical basis further mechanism.