Lower-Than-Expected Floret Sterility of Rice under Extremely Hot Conditions in a Flood-Irrigated Field in New South Wales, Australia

被引：27

作者：

Matsui, Tsutomu ^{[1
]}

Kobayasi, Kazuhiro ^{[2
]}

Nakagawa, Hiroshi ^{[3
]}

Yoshimoto, Mayumi ^{[4
]}

Hasegawa, Toshihiro ^{[4
]}

Reinke, Russell ^{[5
]}

Angus, John ^{[6
]}

机构：

[1] Gzfu Univ, Fac Appl Biol Sci, Gifu 5011193, Japan

[2] Shimane Univ, Fac Life & Environm Sci, Matsue, Shimane 6908504, Japan

[3] Natl Agr Res Ctr, Tsukuba, Ibaraki 3058604, Japan

[4] Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, Japan

[5] Yanco Agr Inst, Yanco, NSW 2703, Australia

[6] CSIRO Black Mt Labs, Black Mt, ACT 2601, Australia

来源：

PLANT PRODUCTION SCIENCE | 2014年 / 17卷 / 03期

关键词：

High temperature; Pollen germination; Pollination; Rice; Sterility; Transpirational cooling; HIGH-TEMPERATURE; POLLINATION;

D O I：

10.1626/pps.17.245

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Rice florets are susceptible to high-temperature damage at anthesis, but rice production remains stable in the Riverina region of Australia even when the air temperature during flowering exceeds 40 degrees C. To identify the mechanism that supports rice production under these conditions, we examined sterility and pollination in relation to microclimate and panicle temperature in an extremely hot paddy field in the Riverina region of New South Wales. In windy > 40 degrees C weather, the panicle temperature was > 38 degrees C at the windward edge of the crop but around 35 degrees C inside the crop, probably because of strong transpirational cooling due to the extremely dry wind (15% RH). Pollen from the windward edge of the crop showed extremely poor germination, yet that from inside the crop showed sufficient germination for fertilization. Moreover, sterility inside the crop was significantly lower than that at windward edge. We concluded that the wind with large vapor pressure deficit enabled stable rice production under the extreme heat during flowering.

引用

页码：245 / 252

页数：8

共 16 条

[1]

Angus J., 1997, FIELD CROPS RES, V52, P286

[2]

Horie T., 1996, Climate change and plants in East Asia., P39

[3] High temperature stress and spikelet fertility in rice (Oryza sativa L.) [J].