Sterility and Poor Pollination Due to Early Flower Opening Induced by Methyl Jasmonate
Sterility and Poor Pollination Due to Early Flower Opening Induced by Methyl Jasmonate
复制标题
DOI：
10.1626/pps.13.29
复制
发表时间：
2010-01-01
影响因子：
2.5
通讯作者：
Atsuta, Yumi
中科院分区：
文献类型：
--
作者：
Kobayasi, Kazuhiro;Atsuta, Yumi
清晨开花有助于避免开花期热胁迫诱导的水稻不育。采用盆栽试验研究了茉莉酸甲酯（MeJA）对水稻开花时间、不育性、授粉和花药开裂的影响。在0900、1000或1100时，将4 mmol L（-1）MeJA溶液（每穗3 mL）和水（作为对照）施用于粳稻型栽培品种‘Hinohikari’的穗。通过每隔4分钟拍摄花朵，我们确定了FOT。花不育，授粉，花药开裂也进行了检查。0900时施MeJA溶液比不施MeJA溶液提前FOT约2 h，比施水后提前FOT约1.5h。MeJA在1000的应用也提高了FOT，但在1100没有。MeJA溶液的施用显著增加了处理当天的花朵开放数量，并降低了处理后一天的花朵开放数量。0900时喷施MeJA溶液，与不处理相比，显著提高了花的不育性。用MeJA处理并在处理当天开放的花中，超过40%是预期在第二天开放的花。这些结果表明，由MeJA的应用诱导的不育性是由预期在处理后第二天开放的花的提前开放引起的。
Flower opening in the early morning helps avoid sterility induced by heat stress at anthesis in rice (Oryza sativa L.). A pot experiment was conducted to reveal the effects of methyl jasmonate (MeJA) on flower opening time (FOT), sterility, pollination, and anther dehiscence. Four mmol L(-1) MeJA solution (3 mL per panicle) and water, as a control, was applied to the panicles of the japonica type rice cultivar `Hinohikari' at 0900, 1000, or 1100. By photographing flowers at 4-min intervals, we determined the FOT. Flower sterility, pollination, and anther dehiscence were also examined. Application of MeJA solution at 0900 advanced FOT about 2 hr compared with that without application, and 1.5 hr compared with that after application of water. MeJA application at 1000 also advanced FOT, but that at 1100 did not. Application of MeJA solution significantly increased the numbers of flowers opening on the day of treatment and decreased that on the day after treatment. Application of MeJA solution at 0900 significantly increased flower sterility compared with that without treatment. More than 40% of the flowers that were treated with MeJA and opened on the day of treatment were those expected to open on the next day. These results suggest that sterility induced by application of MeJA is caused by the early opening of flowers expected to open the day after treatment.