EFFECT OF RADIATION AND TEMPERATURE ON EFFICIENCY OF CEREAL LEAVES DURING GRAIN GROWTH

被引:38
作者
WELBANK, PJ
WITTS, KJ
THORNE, GN
机构
[1] Rothamsted Experimental Station, Harpenden, Herts
关键词
D O I
10.1093/oxfordjournals.aob.a084201
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Grain: leaf ratio, G (the ratio of grain yield to leaf area duration between ear emergence and maturity), in 15 experiments on wheat and barley in different seasons (Group A experiments) was highly correlated with mean daily radiation, R, mean daily temperature, Tμ, and mean daily maximum temperature, Tmax, during the grain growth period. The regression of G on R accounted for 81 per cent of the variance of G, and introducing Tμ to the regression significantly increased this to 88 per cent. The regression of G on Tmax alone accounted for 87 per cent, perhaps because Tmax effectively integrates radiation and temperature.When R was varied artificially by shades in two experiments on wheat in different years (Group B experiments) the relationship between G and R was approximately linear in both, but the slope of the line was less in one year, when R and temperature were less, than in the other. For this second year, when R and temperatures were about the middle of the ranges found in Group A experiments, the calculated relationship agrees with the Group A results after correcting values of G for differences of Tu from its value in the shading experiment. A formula relating G and R derived from the results of both Group B experiments and the observed correlation of R and temperature in the field, assuming that the regression of G on R depends on temperature, agrees with the relationship between G and R in the Group A experiments.It is concluded that differences in radiation and temperature are about equally responsible for the differences in G found between seasons. The positive effect of temperature on G suggests that factors other than leaf photosynthesis, e.g. translocation rate or capacity of the grain to accumulate carbohydrate, are important in determining G. © 1968 OXFORD UNIVERSITY PRESS.
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页码:79 / +
页数:1
相关论文
共 33 条
[1]  
Archbold HK, 1942, ANN BOT-LONDON, V6, P1
[2]   EFFECT OF TEMPERATURE STRESS ON GRAIN DEVELOPMENT IN WHEAT [J].
ASANA, RD ;
WILLIAMS, RF .
AUSTRALIAN JOURNAL OF AGRICULTURAL RESEARCH, 1965, 16 (01) :1-&
[3]  
BIRECKA L, 1966, ACTA SOC BOT POL, V35, P637
[4]  
BLACK J. N., 1955, AUSTRALIAN JOUR BIOL SCL, V8, P330
[5]  
BLACKMAN G. E., 1959, ANN BOT, V23, P51
[6]  
BLACKMAN GE, 1948, ANN BOT-LONDON, V12, P1
[7]  
BLACKMAN GE, 1951, ANN BOT-LONDON, V15, P64
[8]   CARBOHYDRATE UTILIZATION AS FACTOR IN PLANT GROWTH [J].
BURT, RL .
AUSTRALIAN JOURNAL OF BIOLOGICAL SCIENCES, 1964, 17 (04) :867-&
[9]  
EVANS LT, 1963, ENVIRONMENTAL CON ED, P149
[10]  
FRIEND D.J.C., 1966, GROWTH CEREALS GRASS, P181