在野生的相对根茎上移植的西红植物的耐热性
Chungkeun Lee1, Joshua T Harvey1, Asmita Nagila1
1Texas A&M AgriLife Research and Extension Center, Texas A&M University, Uvalde, TX, United States.
Frontiers in plant science
|December 6, 2023
概括
在Solanum peruvianum根茎上移植西红片可以通过提高抗氧化能力和光合作用率来提高耐热性. 这种野生亲戚显示出开发耐热番茄品种的希望.
科学领域:
- 植物生理学和遗传学
- 园艺科学 园艺科学
- 提高作物质量 提高作物质量
背景情况:
- 热压在全球范围内显著限制了番茄产量.
- 番茄的野生亲属,如Solanum pennellii和S. peruvianum,具有耐旱性,但它们的热应激反应,特别是作为根茎,尚未得到充分探索.
- 接种是一种用于提高作物对环境压力的弹性技术.
研究的目的:
- 为了评估在Solanum pennellii和S. peruvianum根茎上移植的番茄苗的生理和生物化学热应激反应.
- 为了比较野生相对根茎与商业根茎 ("Maxifort") 的有效性,以及在热应力下自我移植的对照.
- 为了识别野生番茄亲属的潜在耐热特征,用于繁殖目的.
主要方法:
- 番茄茎 ("名人"和"阿肯色旅行者") 被移植到"马克西福特",S. pennellii,S. peruvianum,或自我移植的对照.
- 植入的苗木经过21天的高 (38/30°C) 和最佳 (26/19°C) 温度.
- 测量了生理参数 (林含量,抗氧化能力,酶活性,叶绿素含量,叶绿素光,净光合作用率,ABA含量) 和植物生长.
主要成果:
- 在热应激下,Solanum peruvianum根茎显著增强了耐热性,增加了叶子素,非酶体抗氧化能力和抗氧化酶活动 (超氧化物脱酶,催化酶,过氧化酶).
- Solanum pennellii根茎表现出热敏度,在热应激下显示出较低的抗氧化酶活性.
- 无论是S. pennellii还是S. peruvianum的根茎都改善了叶子中的叶绿素含量,叶绿素光和热下净光合作用率,但减少了植物的整体生长,可能是由于移植不相容.
结论:
- 野生相对根茎Solanum peruvianum有效地提高了番茄子苗的耐热性.
- 苏兰 (Solanum peruvianum) 显示出作为一种有价值的育种材料的潜力,可以将耐热性特征入跨物种番茄根茎中.
- 根据这项研究,Solanum pennellii似乎不太适合作为根茎来改善西红的耐热性.
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