Evaluation of Alfalfa Autotoxicity on Germination and Early Seedling Growth of 3 Cultivars

• 발행기관: 한국자원식물학회
• 저자명: Sang-Uk Chon Seong-Kyu Choi
• 간행물 정보: 『Plant Resources』Vol.3 No.1, 71~78쪽, 전체 8쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2000.05.31

영문 초록

Autotoxicity restricts reseeding of new alfalfa(Medicago sativa L.) after alfalfa until autotoxic chemical(s) breaks down or is dispersed into external environments, often requiring up to a year or more. One solution for reducing autotoxicity would be to select germplasms or cultivars with tolerance to the autotoxic chemical(s) and use genetically breeding program. Bioassay of seed germination and early seedling growth was conducted to evaluate autotoxic responses of 3 varieties of alfalfa to the water-soluble extracts(at 4 and 8g/L) from alfalfa Cody leaf by using agar and filter paper medium in a petri-dish assay. Root length at 5 days after seeding was more sensitive to the extract than was hypocotyl length or seed germination, and was a better parameter of autotoxic effects of alfalfa leaf extracts. Use of an agar medium gave better sensitivity of root length than did use of filter paper. Evaluating tolerance with percent of control was more important indicator than was mean of root length, because of significant variation among varieties in root length of control treatment. Bioassay ranked varieties in the following order of tolerance on the basis of relative root length; Cody > Pioneer 5373 > Alfagraze”. Seedling growth from old Cody seed was more sensitive to the autotoxic chemical(s) than was that from newly produced seed.

목차

INTRODUCTION

MATERIALS AND METHODS

RESULTS AND DISCUSSION

키워드

Alfalfa Autotoxicity Growth Medium Root Length Relative Root Length.