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Seed‐enhancement combinations improve germination and handling in two dominant native grass species
Restoration Ecology ( IF 3.2 ) Pub Date : 2020-08-27 , DOI: 10.1111/rec.13275
Bianca Berto 1, 2 , Alison L. Ritchie 1, 2 , Todd E. Erickson 1, 2
Affiliation  

The use of native grasses for both restoration and commercial purposes is becoming increasingly important globally. Many native grasses have limited success in seed‐based restoration (e.g. post‐mine rehabilitation) and commercial industries (e.g. agriculture) due to poor seed germination and handling. Seed‐enhancement technologies can assist in overcoming these barriers. This study aimed to use combinations of seed enhancements to overcome the germination and handling challenges in two dominant Australian native grass species with demand in restoration and commercial industries (Triodia wiseana C.A Gardner and Rytidosperma caespitosum [Gaudich.] Connor & Edgar). Selected enhancements included hydropriming (including inoculation with karrikinolide [KAR1]), flash flaming, and seed coating. Combinations of these seed enhancements allowed improvements in both germination (by up to 55% and 18% for T. wiseana and R. caespitosum, respectively) and floret geometry (flowability, as measured through a mechanized seeder, improved by up to 6‐fold and 17‐fold for T. wiseana and R. caespitosum, respectively), with the order of enhancement application being important. The responses of each species to enhancements corresponded with key biological processes and ecological cues required for recruitment events in nature, such as fire and rainfall events. Triodia wiseana germination was driven by fire‐related cues (i.e. KAR1, flaming), while R. caespitosum germination was highest in response to moisture‐related cues (i.e. hydro‐priming). Responses to seed enhancements (and combinations of) may have implications for the management and scaled use of the targeted species. This can assist in improving the restoration and commercial success of the study species, and potentially other grasses with germination and handling challenges, into the future.

中文翻译:

增强种子的组合可改善两种优势原生草种的发芽和处理

在全球范围内,将天然草用于恢复和商业目的变得越来越重要。由于种子发芽和处理不佳,许多原生草在基于种子的恢复(例如,矿山复垦)和商业行业(例如,农业)方面的成功有限。种子增强技术可以帮助克服这些障碍。这项研究的目的是利用种子增强剂的组合来克服两种主要的澳大利亚本土草种的发芽和处理挑战,这两种草种在恢复和商业产业中都具有需求(Triodia wiseana CA Gardner和Rytidosperma caespitosum [Gaudich。] Connor&Edgar)。选定的增强功能包括加水底漆(包括接种karrikinolide [KAR 1]),火红和种皮。允许改进在两个发芽(由最高达55%和18%对这些种子增强的组合T. wiseanaR. caespitosum分别)和作为通过机械化播种机测量小花几何形状(流动性,通过向上提升至6倍分别为明智T. wiseanaR. caespitosum的17倍),增强应用的顺序很重要。每个物种对增强的响应与自然募集事件(例如火灾和降雨事件)所需的关键生物过程和生态线索相对应。明智的Triodia wiseana萌发是由与火有关的线索(即KAR 1,燃烧)引起的,而在与水分有关的线索(即加水引发)的反应中,盲肠R. caespitosum的发芽率最高。对种子增强(及其组合)的反应可能对目标物种的管理和大规模使用产生影响。这可以在将来帮助改善研究物种以及潜在发芽和处理挑战的其他草的恢复和商业成功。
更新日期:2020-08-27
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