欧亚国际

刚刚，科学家利用Plantarray功能生理表型研究系统，发表了题为“Dynamic physiological response of tef to contrasting water availabilities”的文章，目前利用该系统发表文章已经超过50篇，包括Cell主刊。

tef对不同水可用性的动态生理响应

全球气候变化导致极端气候事件的频率增加-温度更高和缺水。Tef （Eragrostis tef （Zucc.））是一种未被充分利用的 C4 谷物作物，抗逆性强和、营养丰富。尽管作为一种“机会”作物越来越受到关注，TEF对干旱胁迫的生理响应和适应机制尚未确定经过充分调查。本研究旨在表征动态TEF对干旱的生理响应。对六种选定的 tef 基因型进行了研究，进行了高通量全植物功能表型分析，以评估多个水状况的生理反应。干旱胁迫分别导致了总干重、地上条干重和根干重分别大幅减少59%、62%和44%（不同基因型的平均值），相对于对照处理，增加了 50%根枝比率。干旱处理也显著增加气孔导度、蒸腾作用、渗透势和用水量减少效率，增加叶绿素含量和延迟抽穗。Tef基因型在干旱下表现出多样化的用水策略：节水（等湿）或非守恒 （anisohydric），或中间策略，以及干旱恢复率。基因型RTC-290b表现出出色的多面抗旱性能，包括高用水效率以及干旱和控制处理下的高生产力，高叶绿素和干旱条件下的蒸腾作用，干旱恢复率更快。本研究探讨了TEF对水的动态功能生理反应以及干旱适应策略中基因型间变异。这些结果可作为进一步研究和开发抗旱TEF品种。

关键字

临界干旱点， 干旱适应， 干旱恢复， 干旱胁迫，生产力， 蒸腾， TEF/画眉草， 用水效率

Dynamic physiological response of tef to contrasting water availabilities 

Global climate change is leading to increased frequency of extreme climatic events,higher temperatures and water scarcity. Tef (Eragrostis tef (Zucc.) Trotter) is an underutilized C4 cereal crop that harbors a rich gene pool for stress resilience and nutritional quality. Despite gaining increasing attention as an“opportunity” crop,physiological responses and adaptive mechanisms of tef to drought stress have not

been sufficiently investigated. This study was aimed to characterize the dynamic physiological responses of tef to drought. Six selected tef genotypes were subjected to high-throughput whole-plant functional phenotyping to assess multiple physiological responses to contrasting water regimes. Drought stress led to a

substantial reduction in total, shoot and root dry weights, by 59%, 62% and 44%,respectively (averaged across genotypes), and an increase of 50% in the root-to shoot ratio, relative to control treatment. Drought treatment induced also significant reductions in stomatal conductance, transpiration, osmotic potential and water-use efficiency, increased chlorophyll content and delayed heading. Tef genotypes exhibited diverse water-use strategies under drought: water-conserving (isohydric) or non-conserving (anisohydric), or an intermediate strategy, as well as variation in drought-recovery rate. Genotype RTC-290b exhibited outstanding multifaceted drought-adaptive performance, including high water-use efficiency coupled with high productivity under drought and control treatments, high chlorophyll and transpiration under drought, and faster drought recovery rate. This study provides a first insight into the dynamic functional physiological responses of tef to water deficiency and the variation between genotypes in drought-adaptive strategies.

These results may serve as a baseline for further studies and for the development of drought-resistant tef varieties. 

KEYWORDS

critical drought point, drought adaptation, drought recovery, drought stress,productivity, transpiration, tef/teff, water-use efficiency