欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报

• 研究报告 • 上一篇    下一篇

变温调控对苦苣温度敏感期及其抽薹开花的影响

贺忠群1**,王军2   

  1. (1四川农业大学园艺学院, 四川雅安 625014; 2西北农林科技大学园艺学院, 陕西杨凌 712100)
  • 出版日期:2015-05-18 发布日期:2015-05-18

Effects of temperature-shifted controlling on bolting and flowering of endive.

HE Zhong-qun1, WANG Jun2   

  1. (1College of Horticulture, Sichuan Agricultural University, Ya’an 625014, Sichuan, China; 2College of Horticulture, Northwest A&F University, Yangling 712100, Shannxi, China)
  • Online:2015-05-18 Published:2015-05-18

摘要:

将苦苣幼苗在温室暖环境(17 ℃)和冷环境(平均10.5 ℃)下每周进行双向互换,研究了苦苣对温度的敏感时期及其在不同温度条件下的生长发育规律.结果表明: 苦苣幼苗在暖环境和冷环境下的生长速度差异显著;在2~17 ℃的设定温度范围内,苦苣没有一个明显的抽薹温度敏感时期,均能感受外界温度从而进行春化诱导,且低温有利于花芽的分化.苦苣在暖环境下和冷环境下均能完成花芽分化和抽薹,冷环境下花芽分化的时间为24 d,暖环境下为60 d.在暖环境下苦苣抽薹比冷环境下抽薹晚7 d,暖环境和冷环境下苦苣从播种到抽薹的平均时间分别为111和104 d;开花诱导完成后从暖环境转到冷环境下,苦苣的抽薹速率明显高于从冷环境转到暖环境,在这段时间环境温度越高,抽薹速率越快.

 

Abstract: Temperature sensitive periods and growth characteristics of endive under different temperatures were investigated in greenhouse by weekly reciprocal transferring experiment condition between warm (17 ℃) and cold (average 10.5 ℃) environment. The results indicated that difference in growth rate of endive was significant in cold and warm environments. There was no  temperature sensitive period in endive, and it could feel outside temperature, thus, conducted vernalization induction in setting temperature range (2-17 ℃). Meanwhile, low temperature favored the flower bud differentiation. Endives all completed flower bud differentiation and bloting either in warm or in cold environment. It took 24 days to complete flower bud differentiation in cold environment and 60 days in warm environment, and bolting was 7 days later in warm environment than in cold environment. From seeding to bolting, it took 111 days in warm environment and 104 days in cold environment, respectively. After flowering induction, the seeding bolting rate from warm environment to cold environment was obviously higher than that from cold to warm environment and higher temperature led to faster bolting in this period.