Responses of Grafted Watermelon onto Cucurbita pepo Tiana F1 Hybrid to Boron Nutritional Disorders

• 作者: Sabbatini Paolo Shirani Bidabadi Siamak
• 来源期刊: 园艺学报（英文版）
• 年，卷（期）: 2019,（5）
• 所属期刊栏目: Research Papers
• 页码范围: 213-220
• 页数: 8页
• 语种: 英文

摘要

Sensitivity to boron stress in growing media during the early seedlings stage could severely inhibit watermelon growth and development. The aim of this study was to test if watermelon (Citrullus lanatus cv. Mahbubi) performance can be improved under different boron concentrations (0, 46.31 and 935.11μmol·L? 1 H3BO3) by grafting watermelon plants onto Cucurbita pepo Tiana F1 hybrid rootstock. Shoot dry weight of grafted watermelon was significantly higher than those of non-grafted plants under boron stress conditions (0 and 935.11μmol·L? 1). Boron concentra-tion of the aerial organs of the grafted plants was higher than in the non-grafted ones when treated with 0μmol·L? 1 H3BO3. However, with the application of boron (935.11μmol·L? 1 H3BO3), the aerial organs of grafted plants accumulated lower boron than non-grafted ones. The Cucurbita pepo rootstock also improved the absorption of several other nutrients and leaf chlorophyll content and the Fv/Fm ratio was also increased at high boron root concentration. Higher activities of several antioxidant enzymes such as catalase (CAT), superoxide dismutase (SOD) and peroxidase (POX) in grafted watermelons were associated with a significant reduction in H2O2 and malondialdehyde (MDA) generation when compared with those of non-grafted plants under boron stress conditions (0 and 935.11μmol·L? 1 H3BO3). Grafted plants reported improved growth, nutrient uptake and several other physiological parameters when compared to non-grafted watermelon plants under boron stress conditions.