欢迎访问《麦类作物学报》编辑部网站

为探究小麦花后早期增温对其旗叶和籽粒生长发育的影响，以黄淮海南片主栽小麦品种安农0711和烟农19为试验材料，通过在小麦花后0～10 d搭棚覆盖PO薄膜方式进行人工模拟增温（增温1~ 3 ℃），测定分析了花后早期增温后小麦旗叶光合参数、叶绿素含量、抗氧化酶活性、MDA含量和籽粒性状的变化。结果表明，与常温对照相比，增温显著降低了旗叶净光合速率、叶绿素含量及 CAT和POD活性，增加了旗叶胞间CO₂浓度和MDA含量，加速了旗叶衰老，使籽粒长度、宽度、厚度和千粒重均下降，安农0711和烟农19的粒重降幅分别为5.43%和7.34%。这说明在本试验条件下，花后早期增温不利于小麦旗叶光合和抗氧化作用，加速旗叶衰老，抑制籽粒发育。

英文摘要:

In order to explore the effect of temperature increase during early grain-filling stage on the growth and development of flag leaf and grain of wheat, the wheat varieties(Annong 0711 and Yannong 19), mainly planted in South Huang-Huai-Hai region, were used as experimental materials. The artificial temperature increase(1-3 ℃) was carried out by covering PO film in a shed from 0 to 10 days after anthesis. The photosynthetic parameters, chlorophyll content and antioxidant enzyme activity of flag leaf,MDA content and grain characters of wheat under early warming after anthesis were determined and analyzed. The results showed that, increasing temperature significantly reduced the net photosynthetic rate, chlorophyll content, CAT and POD activities, increasing the intercellular carbon dioxide concentration and MDA content of flag leaves, accelerating flag leaf senescence, and reduced the length, width, thickness and 1 000 grain weight of flag leaves. The grain weight of Annong 0711 and Yannong 19 was decreased by 5.43% and 7.34%, respectively. This indicated that under the condition of this experiment, increasing temperature at the early stage after anthesis was not conducive harmful to the photosynthesis and antioxidation of wheat flag leaf,which accelerated flag leaf senescence and inhibited grain development.

查看全文查看/发表评论下载PDF阅读器

关闭