ABSTRACT

High levels of boron (B) in soils cause toxicity in tomatoes, but inoculation of arbuscular mycorrhizal fungi (AMF) into plants can reduce it. This study aimed to evaluate the effects of AMF inoculation on morphological parameters (shoot height, plant fresh and dry weights), yield, leaf chlorophyll and boron content, and fruit characteristics (weight, water and soluble solid contents, firmness, color) of tomato plants grown in boron stress (0.06, 0.5, 1.0, 2.0, 4.0, and 8.0 mM). Increased boron concentrations reduced all parameters except leaf boron content, fruit soluble solids and firmness. However, the highest values of the morphological parameters, fruit soluble solid contents and red color values (control, 0.5 and 1.0 mM B), fruit yield (<8.0 mM B), leaf chlorophyll content (≤2.0 mM B), fruit weight (control, 0.5 and 2.0 mM B), fruit firmness (control and 1.0 mM B) were obtained from mycorrhizal plants. No significant differences were found between the fruit water content and color values (brightness and yellow) of non-mycorrhizal and mycorrhizal plants in all boron stress levels. The leaf boron concentration in inoculated with mycorrhizal fungi had lower than non-inoculated ones. These results suggest that mycorrhizal-inoculation may limit excessive boron uptake and alternatively be used in boron contaminated soils.

摘要

土壤中高含量的硼 (B) 会导致番茄中毒，但将丛枝菌根真菌 (AMF) 接种到植物中可以降低这种毒性。本研究旨在评估 AMF 接种对番茄形态参数（茎高、植株鲜重和干重）、产量、叶叶绿素和硼含量以及果实特性（重量、水和可溶性固形物含量、硬度、颜色）的影响。在硼胁迫（0.06、0.5、1.0、2.0、4.0 和 8.0 mM）中生长的植物。硼浓度的增加降低了除叶硼含量、果实可溶性固体和硬度之外的所有参数。然而，形态参数、果实可溶性固形物含量和红色值（对照，0.5 和 1.0 mM B）、果实产量（<8.0 mM B）、叶叶绿素含量（≤2.0 mM B）、果实重量（对照，0.5 和 2.0 mM B)，果实硬度（对照和 1.0 mM B）来自菌根植物。在所有硼胁迫水平下，非菌根和菌根植物的果实含水量和颜色值（亮度和黄色）之间没有发现显着差异。接种菌根真菌的叶硼浓度低于未接种菌根真菌。这些结果表明菌根接种可以限制硼的过度吸收，也可以用于硼污染的土壤。