Pane Catello, Galieni Angelica, Riefolo Carmela, Nicastro Nicola, Castrignanò Annamaria
Council for Agricultural Research and Economics (CREA), Research Centre for Vegetable and Ornamental Crops, Via Cavalleggeri 25, 84098 Pontecagnano Faiano, Italy.
Council for Agricultural Research and Economics (CREA), Research Centre for Vegetable and Ornamental Crops, Via Salaria 1, 63030 Monsampolo del Tronto, Italy.
Plants (Basel). 2021 Nov 25;10(12):2575. doi: 10.3390/plants10122575.
Baby leaf wild rocket cropping systems feeding the high convenience salad chain are prone to a set of disease agents that require management measures compatible with the sustainability-own features of the ready-to-eat food segment. In this light, bio-based disease resistance inducers able to elicit the plant's defense mechanism(s) against a wide-spectrum of pathogens are proposed as safe and effective remedies as alternatives to synthetic fungicides, to be, however, implemented under practical field applications. Hyperspectral-based proximal sensing was applied here to detect plant reflectance response to treatment of wild rocket beds with strain TA35, laminarin-based Vacciplant, and strain LAS117 cell wall extract-based Romeo, compared to a local standard approach including synthetic fungicides (i.e., cyprodinil, fludioxonil, mandipropamid, and metalaxyl-m) and a not-treated control. Variability of the spectral information acquired in VIS-NIR-SWIR regions per treatment was explained by three principal components associated with foliar absorption of water, structural characteristics of the vegetation, and the ecophysiological plant status. Therefore, the following model-based statistical approach returned the interpretation of the inducers' performances at field scale consistent with their putative biological effects. The study stated that compost and laminarin-based treatments were the highest crop impacting ones, resulting in enhanced water intake and in stress-related pigment adjustment, respectively. Whereas plants under the conventional chemical management proved to be in better vigor and health status than the untreated control.
为高便利性沙拉连锁店供应的嫩茎野生芝麻菜种植系统容易受到一系列病原体的侵害，这就需要采取与即食食品领域可持续性自身特点相适应的管理措施。有鉴于此，能够引发植物针对多种病原体的防御机制的生物基抗病诱导剂被提议作为合成杀菌剂的安全有效替代补救措施，但需要在实际田间应用中实施。本文应用基于高光谱的近距离传感技术，检测野生芝麻菜苗床经TA35菌株、海带多糖基Vacciplant和基于LAS117菌株细胞壁提取物的Romeo处理后的植物反射率响应，并与包括合成杀菌剂（即嘧菌环胺、咯菌腈、霜霉威和甲霜灵锰锌）的当地标准方法以及未处理的对照进行比较。每次处理在可见-近红外-短波红外区域获取的光谱信息的变异性由与叶片水分吸收、植被结构特征和植物生态生理状态相关的三个主成分来解释。因此，以下基于模型的统计方法得出了诱导剂在田间尺度上的性能解释，这与它们假定的生物学效应一致。该研究表明，堆肥和基于海带多糖的处理对作物的影响最大，分别导致水分吸收增加和与胁迫相关的色素调整。而采用传统化学管理的植物比未处理的对照表现出更好的活力和健康状况。
