RATE OF DEVELOPMENT OF POSTANTHESIS WATER DEFICITS AND GRAIN FILLING OF SPRING WHEAT

被引:168
作者
KOBATA, T
PALTA, JA
TURNER, NC
机构
[1] CSIRO,DRYLAND CROPS & SOILS RES UNIT,DIV PLANT IND,PRIVATE BAG PO,WEMBLY,WA 6014,AUSTRALIA
[2] SHINSHU UNIV,FAC AGR,MATSUMOTO,NAGANO 390,JAPAN
关键词
D O I
10.2135/cropsci1992.0011183X003200050035x
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Wheat crops (Triticum aestivum L.) often experience water deficits during grain filling, thereby reducing grain yield. We determined the effect of the rate of development of postanthesis water deficits on the grain growth of wheat. Plants were grown in a pot experiment in two temperature-regulated glasshouses with similar temperatures, but with high and low relative humidities. Differences in the rate of increasing plant water deficits between the high and low humidity treatment became evident within 6 d after watering was stopped. During the first 19 d after anthesis, the rates were 0.10 and 0.18 MPa d-1, respectively. Grain yield at low humidity was reduced by 33%, relative to high humidity, mainly as a result of a reduction in grain size. An early cessation of grain growth after mid grain filling probably induced the reduction in grain size. We conclude that differences in grain growth in the two humidity treatments resulted from the different rates of development of water deficits in the two treatments. In the low-humidity treatment, the size of the grain in the tillers was reduced more than the size of the grain on the mainstem. The increase in the grain dry matter of the mainstem was higher than the total increase in mainstem dry matter during the grain-filling period. The increase in grain dry matter of Tiller 1 was also higher, but in Tiller 2 it was lower, indicating that grain growth on the mainstem was probably supported by assimilates stored in the stems, leaves, and roots and by transfer of assimilates from tillers.
引用
收藏
页码:1238 / 1242
页数:5
相关论文
共 21 条
[1]   CONTRIBUTIONS TO GRAIN-YIELD FROM PRE-ANTHESIS ASSIMILATION IN TALL AND DWARF BARLEY PHENOTYPES IN 2 CONTRASTING SEASONS [J].
AUSTIN, RB ;
MORGAN, CL ;
FORD, MA ;
BLACKWELL, RD .
ANNALS OF BOTANY, 1980, 45 (03) :309-319
[2]   FATE OF DRY-MATTER, CARBOHYDRATES AND C-14 LOST FROM LEAVES AND STEMS OF WHEAT DURING GRAIN FILLING [J].
AUSTIN, RB ;
EDRICH, JA ;
FORD, MA ;
BLACKWELL, RD .
ANNALS OF BOTANY, 1977, 41 (176) :1309-1321
[3]   CONTRIBUTION OF STORED PRE-ANTHESIS ASSIMILATE TO GRAIN-YIELD IN WHEAT AND BARLEY [J].
BIDINGER, F ;
MUSGRAVE, RB ;
FISCHER, RA .
NATURE, 1977, 270 (5636) :431-433
[4]   A REAPPRAISAL OF STEM RESERVE CONTRIBUTION TO GRAIN-YIELD IN SPRING BARLEY (HORDEUM-VULGARE-L) [J].
DANIELS, RW ;
ALCOCK, MB ;
SCARISBRICK, DH .
JOURNAL OF AGRICULTURAL SCIENCE, 1982, 98 (APR) :347-355
[5]  
FITZPATRICK EA, 1970, MISC PUBL U W AUSTR, V70
[6]   EFFECTS OF DROUGHT ON GRAIN-GROWTH [J].
GALLAGHER, JN ;
BISCOE, PV ;
HUNTER, B .
NATURE, 1976, 264 (5586) :541-542
[7]   THE COST OF STRESS - DRY-MATTER PARTITIONING CHANGES WITH SEASONAL SUPPLY OF WATER AND NITROGEN TO DRYLAND WHEAT [J].
HAMBLIN, A ;
TENNANT, D ;
PERRY, MW .
PLANT AND SOIL, 1990, 122 (01) :47-58
[8]   LEAF GAS-EXCHANGE AND WATER RELATIONS OF LUPINS AND WHEAT .1. SHOOT RESPONSES TO SOIL-WATER DEFICITS [J].
HENSON, IE ;
JENSEN, CR ;
TURNER, NC .
AUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY, 1989, 16 (05) :401-413
[9]   EFFECT OF WATER STRESS ON CO-14(2) FIXATION AND TRANSLOCATION IN WHEAT DURING GRAIN FILLING [J].
JOHNSON, RR ;
MOSS, DN .
CROP SCIENCE, 1976, 16 (05) :697-701