Phenotypic Plasticity, Parental Effects, and Parental Care in Plants: An Examination of Spike Reflectance in Plantago lanceolata

植物的表型可塑性、亲本效应和亲本护理：车前子穗反射率的检查

• 批准号: 0236526
• 负责人: Elizabeth Lacey
• 金额: $ 46.3万
• 依托单位: University of North Carolina Greensboro
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-03-01 至 2009-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0236526&HistoricalAwards=false
• 关键词: Phenotypic; Plasticity; Parental; Effects; Care

Dr. Lacey will address fundamental questions about plant reflectance patterns. Previous experiments with Plantago lanceolata show that during the flowering season, 1) warm temperatures produce higher quality offspring than do cool temperatures and 2) the reproductive structures in P. lanceolata adjust the amount of incoming solar radiation that they reflect (and conversely absorb) in response to prevailing temperature. For example, when temperatures are low, developing flowers and fruits produce pigments that reduce reflectance and increase absorption. Dr. Lacey will measure the effects of this plastic response in reflectance pattern on seed quantity and offspring quality, and she will test the hypothesis that this plasticity in reflectance is adaptive, in other words, that by adjusting reflectance, parents thermoregulate fertilization and early offspring development to enhance seed production and offspring quality. Dr. Lacey will also test the hypothesis that populations from different latitudes and altitudes differ genetically in overall reflectance pattern.There are two practical aspects of the experiments. First, experiments will explicitly examine how reflectance helps plants thermoregulate seed production and quality, which are of agronomic as well as evolutionary importance. Because current knowledge about thermoregulation in plants is negligible, P. lanceolata will serve as a model organism for collecting data that can later be applied to crop species. Second, the data will improve our understanding of how seed production and quality in natural and crop populations will respond to global warming.

莱西博士将探讨有关植物反射模式的基本问题。之前对车前草的实验表明，在开花季节，1)温暖的温度比低温产生更高质量的后代，2)车前草的生殖结构调整它们反射(和相反地吸收)的传入太阳辐射量，以响应当时的温度。例如，当气温较低时，发育中的花卉和水果会产生减少反射率和增加吸收的色素。莱西博士将测量这种反射率模式的可塑性反应对种子数量和后代质量的影响，她还将检验这种反射率可塑性是适应性的假设，换句话说，通过调节反射率，父母通过调节受精和早期后代发育来提高种子产量和后代质量。莱西博士还将检验这一假设，即来自不同纬度和海拔的种群在总体反射模式上存在遗传差异。实验有两个实际方面。首先，实验将明确研究反射率如何帮助植物对种子产量和质量进行温度调节，这对农学和进化都具有重要意义。由于目前关于植物体温调节的知识可以忽略不计，杉木将成为收集数据的模式生物，这些数据可以在以后应用于作物物种。其次，这些数据将提高我们对自然和作物种群的种子产量和质量将如何应对全球变暖的理解。