Ayyanath Murali-Mohan, Shukla Mukund R, Saxena Praveen K
Department of Plant Agriculture, Gosling Research Institute for Plant Preservation, University of Guelph, Guelph, ON N1G 2W1, Canada.
Plants (Basel). 2023 Mar 8;12(6):1233. doi: 10.3390/plants12061233.
Hazelnuts have recently gathered tremendous attention due to the expansion of the confectionary industry. However, the sourced cultivars fail to perform in initial phase of cultivation as they enter bare survival mode due to changes in climatic zones, for example, Southern Ontario, where the climate is continental, as opposed to the milder climate in Europe and Turkey. Indoleamines have been shown to counter abiotic stress and modulate vegetative and reproductive development of plants. Here, we examined the effect of indoleamines on the flowering response of the dormant stem cuttings of sourced hazelnut cultivars in controlled environment chambers. The stem cuttings were exposed to sudden summer-like conditions (abiotic stress) and the female flower development was assessed in relation to endogenous indoleamine titers. The sourced cultivars responded well to serotonin treatment by producing more flowers compared to the controls or other treatments. The probability of buds resulting in female flowers was highest in the middle region of the stem cuttings. It is interesting to note that the tryptamine titers of the locally adapted, and -acetyl serotonin titers of native hazelnut cultivars, provided the best explanation for adaptation to the stress environment. Titers of both compounds were compromised in the sourced cultivars which resorted mostly to serotonin concentrations to counter the stress. The indoleamines tool kit identified in this study could be deployed in assessing cultivars for stress adaptation attributes.
由于糖果业的扩张，榛子最近受到了极大关注。然而，由于气候带的变化，例如安大略省南部，其气候为大陆性气候，与欧洲和土耳其较为温和的气候不同，所采购的品种在种植初期表现不佳，进入了勉强存活模式。吲哚胺已被证明可以对抗非生物胁迫并调节植物的营养和生殖发育。在此，我们在可控环境舱中研究了吲哚胺对所采购榛子品种休眠茎插条开花反应的影响。将茎插条置于类似夏季的突然条件下（非生物胁迫），并根据内源性吲哚胺滴度评估雌花发育情况。与对照或其他处理相比，所采购的品种对血清素处理反应良好，产生了更多花朵。在茎插条的中部区域，芽发育成雌花的概率最高。值得注意的是，本地适应品种的色胺滴度和本地榛子品种的N-乙酰血清素滴度，为适应胁迫环境提供了最佳解释。在所采购的品种中，这两种化合物的滴度均受到影响，它们主要依靠血清素浓度来应对胁迫。本研究中确定的吲哚胺工具包可用于评估品种的胁迫适应特性。
