HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Related articles in Crop Science Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (2) Citing Articles via Google Scholar Google Scholar Articles by Horbowicz, M. Articles by Obendorf, R. L. Search for Related Content PubMed Articles by Horbowicz, M. Articles by Obendorf, R. L. Agricola Articles by Horbowicz, M. Articles by Obendorf, R. L. Related Collections Crop Physiology & Metabolism Other Grain Crops Seed Physiology

SEED PHYSIOLOGY, PRODUCTION & TECHNOLOGY

Fagopyritol Accumulation and Germination of Buckwheat Seeds Matured at 15, 22, and 30°C

^a Seed Biology, Dep. of Crop and Soil Sciences, Cornell Univ. Agricultural Experiment Station, Cornell Univ., Ithaca, NY 14853-1901
^b Research Institute for Vegetable Crops, Skierniewice, Poland

^* Corresponding author (rlo1{at}cornell.edu)

Common buckwheat (Fagopyrum esculentum Moench; Polygonaceae) embryos accumulate six fagopyritols in two unique series: fagopyritol A1, fagopyritol A2, fagopyritol A3, fagopyritol B1, fagopyritol B2, and fagopyritol B3. Fagopyritol A1 is isosteric to a putative insulin mediator believed to be deficient in subjects with noninsulin dependent diabetes mellitus (NIDDM) and polycystic ovary syndrome (PCOS). Fagopyritols accumulate during seed development, and accumulation is enhanced in response to cooler temperatures. The objective was to test the hypothesis that seed maturation at cooler temperature enhances fagopyritol accumulation, improves seed quality, and increases yield of desirable fagopyritols for dietary treatment of NIDDM and PCOS. Seeds from buckwheat plants grown at 15, 22, or 30°C were harvested at 8, 12, 16, 20, and 28 d after pollination (DAP) and analyzed for soluble carbohydrates in the embryos. Remaining seeds were dried and tested for germination and seedling growth. Embryo dry weight increased rapidly between 8 and 12 DAP at 30°C, 12 and 16 DAP at 22°C, and 16 and 20 DAP at 15°C. Seed dry weight declined (–0.86 mg per 1°C) when maturation temperature increased. Total soluble carbohydrates remained constant across seed maturation temperatures, but the composition of carbohydrates changed in response to different maturation temperatures. Fagopyritol A1 and fagopyritol B1 were highest in seeds matured at 15°C, whereas fagopyritol A2, fagopyritol B2, fagopyritol A3, raffinose, and stachyose were higher in seeds matured at 30°C. At harvest, seeds matured at 30°C had highest germination. Cool temperatures during buckwheat seed maturation can result in increased seed size and yield of fagopyritol A1 and fagopyritol B1 in embryos for nutritional and medicinal applications.

Abbreviations: DAP, days after pollination • DGMI, digalactosyl myo-inositol • DW, dry weight • FW, fresh weight • NIDDM, noninsulin dependent diabetes mellitus • PCOS, polycystic ovary syndrome • RFOs, raffinose family oligosaccharides • RH, relative humidity

Related articles in Crop Science:

THIS ISSUE IN CROP SCIENCE

Crop Science 2005 45: vii. [Full Text]  

This article has been cited by other articles:

				R. L. Obendorf, A. D. Zimmerman, P. A. Ortiz, A. G. Taylor, and S. R. Schnebly Imbibitional Chilling Sensitivity and Soluble Carbohydrate Composition of Low Raffinose, Low Stachyose Soybean Seed Crop Sci., November 24, 2008; 48(6): 2396 - 2403. [Abstract] [Full Text] [PDF]