Department of Life Sciences, Centre for Functional Ecology - Science for People & the Planet (CFE), University of Coimbra, Coimbra, Portugal.
Departamento de Bioloxía Vexetal e Ciencia do Solo, Universidade de Vigo, Vigo, Spain.
J Sci Food Agric. 2019 Jun;99(8):4072-4081. doi: 10.1002/jsfa.9637. Epub 2019 Mar 18.
Acacia dealbata Link is an invasive plant worldwide. Finding potential uses for its waste that contribute to controling its spread and result in benefits for agriculture has recently become a new topic of research. This study aimed to evaluate the potential biostimulant effect of bark extract derived from the management of A. dealbata (0, 450 or 900 ppm) on onion plants growing under stressful conditions, such as in soils treated with saline solutions (0, 60 or 120 mmol L NaCl) and with reduced irrigation (100%, 50% or 25%).
A. dealbata Link bark extract significantly increased height as well as leaf, root and total biomass of plants in soils irrigated with NaCl solution (120 mmol L ). These plants also had a higher content of Cl in roots, but a lower content of P in leaves and of K in bulbs. The 450 ppm bark treatment additionally increased the protein content in leaves and decreased the Na and Mg content in bulbs and bulbs and roots, respectively. The bark extract also increased the sugar content in plants under saline conditions. However, the effect of bark extract was negligible on plants that grew under drought stress.
Results revealed that the bark extract might attenuate stress effects in plants growing at high salinity levels, probably by increasing their sugar and protein content and via the accumulation of ions in the roots. Although additional experiments are required, we suggest that the bark extract of A. dealbata has potential applications in agriculture concerned with biostimulant formulations. © 2019 Society of Chemical Industry.
金合欢（Acacia dealbata Link）是一种世界性的入侵植物。寻找其废物的潜在用途，既能控制其传播，又能为农业带来效益，这已成为一个新的研究课题。本研究旨在评估金合欢树皮提取物（0、450 或 900 ppm）对在胁迫条件下（如用盐水溶液处理的土壤中（0、60 或 120 mmol L NaCl）和灌溉减少（100%、50%或 25%）的洋葱植物的潜在生物刺激作用。
金合欢树皮提取物显著增加了在 NaCl 溶液（120 mmol L）灌溉土壤中生长的植物的高度以及叶片、根和总生物量。这些植物的根中 Cl 含量也更高，但叶片中 P 和鳞茎中 K 含量较低。450 ppm 树皮处理还增加了叶片中的蛋白质含量，降低了鳞茎和鳞茎根中的 Na 和 Mg 含量。树皮提取物还增加了盐胁迫下植物的糖含量。然而，树皮提取物对干旱胁迫下生长的植物的影响可以忽略不计。
结果表明，树皮提取物可能通过增加植物的糖和蛋白质含量以及在根部积累离子来减轻高盐水平下植物的胁迫效应。虽然需要进行更多的实验，但我们建议金合欢树皮提取物在与生物刺激剂配方有关的农业中有潜在的应用。© 2019 英国化学学会。
