Department of Horticulture Science, Faculty of Agriculture, University of Tehran, Karaj, 31587, Iran.
Sci Rep. 2021 Feb 25;11(1):4568. doi: 10.1038/s41598-021-83790-0.
Climate change and population increase are two challenges for crop production in the world. Hazelnut (Corylus avellana L.) is considered an important nut regarding its nutritional and economic values. As a fact, the application of supporting materials as foliage sprays on plants will decrease biotic and abiotic stresses. In this study, the effects of salicylic acid (0, 1 mM and 2.5 mM) and kaolin (0, 3% and 6%) sprays were investigated on morphological, physiological, pomological, and biochemical characteristics of hazelnut. The results showed that 1 mM salicylic acid and 6% kaolin had the best effects on nut and kernel weight compared to control. Biochemical parameters such as chlorophyll a, b, a + b, and carotenoid contents showed that salicylic acid and kaolin improved pigment concentration. Proline and antioxidant contents such as phenolic acids, SOD, APX, and CAT enzyme activities increased by these applications. On the other hand, lipid peroxidation, protein content, and HO content were decreased. Based on the tolerance index result, Merveille de Bollwiller cultivar showed the highest tolerance while 'Fertile de Coutard' had the lowest value. Therefore, hazelnut performance may be improved through exogenous application of the signaling (salicylic acid) and particle film (Kaolin) compounds in warmer climates.
气候变化和人口增长是世界范围内作物生产面临的两大挑战。榛子（Corylus avellana L.）因其营养价值和经济价值而被认为是一种重要的坚果。事实上，应用支持材料（如叶面喷雾）可以减轻生物和非生物胁迫。本研究探讨了水杨酸（0、1 mM 和 2.5 mM）和高岭土（0、3%和 6%）喷雾对榛子形态、生理、园艺和生化特性的影响。结果表明，与对照相比，1 mM 水杨酸和 6%高岭土对坚果和果仁重量的影响最好。生化参数如叶绿素 a、b、a+b 和类胡萝卜素含量表明，水杨酸和高岭土提高了色素浓度。脯氨酸和抗氧化剂含量，如酚酸、SOD、APX 和 CAT 酶活性，通过这些应用增加。另一方面，脂质过氧化、蛋白质含量和 HO 含量降低。根据耐量指数结果，Merveille de Bollwiller 品种表现出最高的耐受力，而 'Fertile de Coutard' 品种的耐受力最低。因此，通过在温暖气候下外源应用信号（水杨酸）和颗粒膜（高岭土）化合物，可以提高榛子的性能。
