Soil:plant signalling networks: manipulations to sustain plant productivity during drought

土壤：植物信号网络：干旱期间维持植物生产力的操作

• 批准号: BB/D012821/1
• 负责人: William Davies
• 金额: $ 33.59万
• 依托单位: Lancaster University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=BB%2FD012821%2F1
• 关键词: Soil; plant; signalling; networks; manipulations

This project assesses the importance of long distance chemical signalling in the control of leaf growth in drying soil. It is argued that both soil to root signalling and root to shoot signalling will be important components of the process controlling vegetative growth in dryland agriculture. It will be important to understand both signalling processes if we are to manipulate plants to sustain productivity under environmental stress. The project is relevant to Sustainable Agricultural Systems since limitation of water use (rain-fed agriculture and/or deficit irrigation) is a crucial goal in many parts of the world, including UK. At the same time, we know that soil drying can greatly restrict plant production. We propose a combination of agronomic techniques (partial rootzone drying, the use of plant growth regulating bacteria) with genetic manipulation (reduced ethylene production under stress, reduced ethylene sensitivity) to overcome both hydraulic and chemical limitation to vegetative growth under drought stress or under deficit irrigation. We will assess the nature and significance of ACC and ABA signalling between soil and roots and between roots and shoots and use a model bacterial system to investigate the potential impact of soil organisms in the regulation of plant functioning in dryland environments. Investigation of this integrated system can provide a novel means of manipulating plant growth under stress on a commercial scale

该项目评估了长距离化学信号在干燥土壤中控制叶片生长的重要性。有人认为，无论是土壤根信号和根到地上部的信号将是重要组成部分的过程中控制旱地农业的营养生长。如果我们要操纵植物在环境压力下维持生产力，了解这两个信号过程将是重要的。该项目与可持续农业系统有关，因为限制用水（雨养农业和/或赤字灌溉）是世界许多地方（包括英国）的一个重要目标。同时，我们知道土壤干燥会极大地限制植物的生产。我们提出了农艺技术（部分根区干燥，植物生长调节细菌的使用）与遗传操作（减少乙烯生产压力下，乙烯敏感性降低）相结合，以克服水分和化学限制营养生长干旱胁迫下或赤字灌溉。我们将评估ACC和阿坝信号的性质和意义之间的土壤和根，根和芽，并使用一个模型细菌系统来调查在旱地环境中植物功能的调节土壤生物的潜在影响。对这种集成系统的研究可以提供一种在商业规模上操纵胁迫下植物生长的新方法