Autotoxic ginsenosides in the rhizosphere contribute to the replant failure of Panax notoginseng.

ABSTRACT:

Background and aims

Sanqi ginseng (Panax notoginseng) growth is often hampered by replant failure. In this study, we aimed to examine the role of autotoxicity in Sanqi replant failures and assess the role of ginsenosides in autotoxicity.

Methods

The autotoxicities were measured using seedling emergence bioassays and root cell vigor staining. The ginsenosides in the roots, soils, and root exudates were identified with HPLC-MS.

Results

The seedling emergence and survival rate decreased significantly with the continuous number of planting years from one to three years. The root exudates, root extracts, and extracts from consecutively cultivated soils also showed significant autotoxicity against seedling emergence and growth. Ginsenosides, including R1, Rg1, Re, Rb1, Rb3,

SUBMITTER: Yang M 

PROVIDER: S-EPMC4335038 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature