Ecological and physiological implications of a vernalization requirement for flowering in creeping herbaceous perennial plants

多年生匍匐草本植物开花春化要求的生态和生理意义

• 批准号: RGPIN-2017-05549
• 负责人: White, Scott
• 金额: $ 1.68万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=753334
• 关键词: Ecological; physiological; implications; vernalization; requirement

Creeping herbaceous perennial plants commonly occur as weeds in agricultural and natural ecosystems in Canada, with many species causing significant economic losses in agriculture and environmental damage in natural ecosystems. Reproducing by seeds and vegetative reproductive structures, these plants have complex life histories and must maintain a balance between flowering and non-flowering meristems to sustain the perennial growth habit. This balance is maintained through the production of dormant or non-dormant buds on vegetative reproductive structures, or through the production of vegetative and flowering shoots, or ramets.Mechanisms regulating ramet development vary, but vernalization (cold exposure) is thought to play a role in some species and has been confirmed in the creeping herbaceous perennial plant red sorrel. Successful management of these plants requires extensive knowledge of the mechanisms regulating plant reproductive biology, and the physiological, ecological, and management implications of vernalization in perennial weeds has not been explored. Red sorrel commonly occurs as a weed in many plant communities in Atlantic Canada, making it a good model species for studying the implications of vernalization in creeping herbaceous perennial weeds.The overall goal of this research is to increase our understanding of the reproductive biology of creeping herbaceous perennial plants, with particular emphasis on the role of vernalization in regulating plant growth and development.In the short term (1 to 5 years), I will use greenhouse and field experiments to determine i) the effects of juvenility and seed and root bud vernalization on flowering, ii) the effect of ramet emergence timing on vernalization response and flowering, iii) the timing of flower primordia formation in vernalized ramets, and iv) if ramets flower repeatedly prior to senescence.Over the long term (5 to 10 years), I want to determine i) if the flower stimulus can be transferred between interconnected ramets, ii) the nature of genetic changes associated with vernalization in creeping herbaceous perennial plants, and iii) the effects of a ramet vernalization requirement on whole-plant growth and development. This research will contribute new knowledge on the role of vernalization in regulating ramet development, whole-plant growth, and population maintenance of creeping herbaceous perennial plants. Additional benefits, however, will arise from the research as our model species is an economically important weed. As such, my research will contribute knowledge that will improve perennial weed management in natural and agricultural plant communities in Northeastern North America. The rationale for this research is that vernalization has unique implications for plant growth and development in creeping herbaceous perennial plants, and that red sorrel is a good model plant species to study this.

加拿大农业和自然生态系统中的杂草通常会发生蔓延的多年生植物植物，许多物种在自然生态系统中造成了农业和环境损害的巨大经济损失。这些植物由种子和营养生殖结构繁殖，具有复杂的生活史，并且必须在开花和非花生分生组织之间保持平衡，以维持多年生的生长习惯。通过生产营养生殖结构上的休眠或非休眠芽，或通过生产营养和开花的芽或拉梅特的生产来维持这种平衡。调节拉米特发育的机制变化了，但是人们认为（冷暴露）在某些物种中起作用，并在某些物种中起着作用，并已在令人毛骨悚然的雌雄同体雌雄同体植物植物中确认。这些植物的成功管理需要广泛了解调节植物生殖生物学的机制，并且尚未探索多年生杂草中春化的生理，生态和管理意义。 Red sorrel commonly occurs as a weed in many plant communities in Atlantic Canada, making it a good model species for studying the implications of vernalization in creeping herbaceous perennial weeds.The overall goal of this research is to increase our understanding of the reproductive biology of creeping herbaceous perennial plants, with particular emphasis on the role of vernalization in regulating plant growth and development.In the short term (1 to 5 years), I will use温室和田间实验以确定i）a）青少年，种子和根芽的果气对开花的影响，ii）二）长期的时间响应和开花的影响，五）在春天的花朵中形成花朵的时间，而iv）以及iv），如果在长期之前又转移了刺激，则可以在5年之前转移。 Ramets，ii）与蔓延的多年生植物植物中的遗传变化的性质，以及iii）Ramet春化需求对全植物生长和发育的影响。这项研究将有助于关于春天在调节ramet发育，全植物增长和人群维持多年生植物多年生植物中的作用方面的作用的新知识。但是，由于我们的模型物种是经济上重要的杂草，因此将产生其他好处。因此，我的研究将促进知识，以改善北美东北部自然和农业植物社区的多年生杂草管理。这项研究的理由是，春化对植物的生长和发育具有独特的意义，在蔓延的多年生植物植物中，红色ors orl是一种研究这一点的良好模型植物物种。