Full TGIF Record # 5218
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Author(s):Tamura, Y.; Nishimura, S.; Hoshino, M.
Author Affiliation:Hokuriku National Agric. Exp. Sta., Joetsu-shi, Niigata 943-01, Japan
Title:Cultivar differences in growth and chemical composition of Italian ryegrass (Lolium multiflorum Lam.) grown under different temperatures
Source:Journal of Japanese Society of Grassland Science. Vol. 23, No. 3, 1977, p. 201-209.
Keywords:TIC Keywords: Lolium multiflorum; Temperatures; Tetraploidy; Diploids; Chemical composition; Carbohydrates; Growth
Abstract/Contents:Seedlings of 3 strains and 5 cv. of Italian ryegrass were grown from the 2-leaf stage under natural outside temp. for late autumn (mean daily temp. down to 8 deg C) or at 15, 20 or 25 deg C for 30 days. At the 4- to 6-leaf stage, seedlings grown outside could be divided into those with a rapid decrease in NAR and increase in RLGR on days 10-20 and 20-30 resp. and those with a slight increase in NAR and decrease in RLGR in the same periods; these were the characteristics of early and late cv. resp. There were positive correlations between RGR and NAR of seedlings grown in controlled environment. Range in DM percentage in the stem, water soluble carbohydrate content, and in total N content of stems and leaves increased in the order 25 deg ( 20 deg ( 15 deg ( outdoor temp. These parameters were correlated in the 15 deg and outdoor temp. treatments. When specific leaf area values of (a) diploid and (b) tetraploid cv. were similar, NAR was higher in (a) than (b), and when DM percentages in the stem were equal at low temp., water soluble carbohydrate was higher and total N lower in (b) than (a). DM percentage in the stem at 30 days under 20 and 25 deg was lower in (b) than (a). Snow-resistant cv. had relatively higher NAR and lower specific leaf area and leaf wt. ratio values than non-snow-resistant cv. under each temp.; the former also had higher DM percentages in the stem, higher water soluble carbohydrate and lower total N content of stems and leaves at 15 deg and in outdoor temp.
Language:Japanese
References:16
Note:Summary appears in English
Geographic Terms:Japan
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Tamura, Y., S. Nishimura, and M. Hoshino. 1977. Cultivar differences in growth and chemical composition of Italian ryegrass (Lolium multiflorum Lam.) grown under different temperatures. (In Japanese) Journal of Japanese Society of Grassland Science. 23(3):p. 201-209.
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