LED for faster and better propagation (LED4FaB Roots)

英国的莴苣和芹菜作物是通过移植来生产的，移植是在温室里繁殖的幼苗，然后种植在田间。很大一部分移植是在冬季和春季生产的，当时白天很短，温室加热要求很高。在加热的温室中，低环境光照水平会导致质量下降，拉伸和生长缓慢，从播种到种植需要6 - 8周。G每年需要500 - 600万棵生菜和300 - 400万棵芹菜移植，收获的作物价值超过250万英镑。沙拉生产商面临的挑战是生产蔬菜移植使用减少的能源投入，并提高质量和对非生物胁迫的恢复能力在移植后阶段建立。这个为期2年的项目将优化补充LED照明辐照度和光谱a）提高质量B）缩短生产周期，和c）操纵根系结构（RSA）在移植。在冬季，在低水平的环境光下，植物生长和质量与支持光合作用的光谱（400 - 700 nm）上的补充辐照度直接相关。HAU和G's之间的先前KTP通过改变红色和蓝色LED照明之间的比率在移植中操纵RSA（数据未公布）。这种反应还没有得到很好的理解，但有可能提高各种作物的移植生产效率。HAU最近的一位博士也提出，具有更大“根潜力”的移植植物更快地从与种植相关的冲击中恢复，并且可能在田间建立和生长期间提高了对非生物胁迫（如干旱）的适应能力。（光谱，辐照度，时间和持续时间）和随后的田间植物表现。与对光的生根反应相关的基因已经在模式生物中鉴定出来。2我们将量化与光相关的关键生根基因的表达，在关键的光照处理下的响应生根性状，以更好地了解这些作物的性状的分子基础。这项工作将使繁殖期的光配方的选择，但响应可能会因基因型而异，限制功效。该项目将利用来自三个合作育种者的种质，a）优化基因型x的光照反应，和B）鉴定育种材料用于未来开发，以优化新品种的繁殖。潜在影响缩短移植生产周期降低加热成本提高移植质量提高作物质量增加对作物物种中根对光响应的分子基础的理解鉴定PACE的感兴趣的品系和基因-定向育种以改进繁殖

UK lettuce and celery crops are produced commercially from transplants - young plants which are propagated in greenhouses before being planted out in the field. A significant proportion of transplants are produced in winter and spring when day lengths are short and greenhouse heating requirements are high. Low ambient light levels in heated greenhouses can lead to reduced quality, stretching and slow growth, taking 6 - 8 weeks from sowing to planting out. G's require 5 - 6 million lettuce and 3 - 4 million celery transplants each year, producing harvested crops worth >£2.5 million. The challenge for salad producers is producing vegetable transplants using reduced energy inputs and having increased quality and resilience to abiotic stress during the post transplanting stage of establishment.This 2-year project would optimise supplementary LED lighting irradiance and spectra for a) improving quality b) shortening production cycles, and c) manipulating root system architecture (RSA) in transplants.During the winter, with low levels of ambient light, plant growth and quality is directly linked to supplementary irradiance across the spectrum that supports photosynthesis (400 - 700 nm). A previous KTP between HAU and G's has manipulated RSA in transplants by varying the ratio between red and blue LED illumination (data not published). This response is not well understood but has the potential to improve efficiency of transplant production across a wide range of crops. A recent PhD at HAU has also suggested that transplants with a greater 'root potential' recover more quickly from shock associated with planting out and may have improved resilience to abiotic stress, such as drought, during establishment and growth in the field.1 This project would study plant growth and RSA development in the greenhouse in response to LED light treatments (spectrum, irradiance, timing and duration) and subsequent plant performance in the field.Genes associated with rooting responses to light have been identified in model organisms.2 We will quantify expression of key rooting genes linked to light-responsive rooting traits under key lighting treatments to better understand the molecular basis of the trait in these crops.The work would enable the selection of light recipes for propagation periods but the response may vary with genotype, limiting efficacy. The project will utilise germplasm from three partner breeders to a) optimise genotype x lighting responses, and b) identify breeding material for future development towards optimised propagation of novel varieties.Potential impactsShortened transplant production cycleReduced heating costsImproved transplant qualityImproved crop qualityIncreased understanding of the molecular basis of root responses to light in crop speciesIdentification of lines and genes of interest for PACE-targeted breeding for improved propagation