1. Light quality and quantity affect graft union formation of tomato plants
- Author
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Dangdi Liang, Li Binqi, Jacek Wróbel, Yong Xu, Hazem M. Kalaji, Muhammad Moaaz Ali, Ahmed Gomaa Gad, Ahmed Fathy Yousef, Hafiz Muhammad Rizwan, and Faxing Chen
- Subjects
0106 biological sciences ,0301 basic medicine ,Cell biology ,Light ,Physiology ,Science ,Color ,01 natural sciences ,Article ,law.invention ,03 medical and health sciences ,Solanum lycopersicum ,Gene Expression Regulation, Plant ,Auxin ,law ,Developmental biology ,Red light ,Hormone signaling ,Vascular tissue ,Plant Proteins ,chemistry.chemical_classification ,Multidisciplinary ,Indoleacetic Acids ,fungi ,food and beverages ,Crop Production ,Environmental sciences ,030104 developmental biology ,Semiconductors ,chemistry ,Seedlings ,Callus ,Medicine ,Electron microscope ,Plant sciences ,Signal Transduction ,010606 plant biology & botany ,Hormone - Abstract
It is already known that there are many factors responsible for the successful formation of a graft union. However, the role of light has been little studied. In an anatomical study, Scanning Electronic Microscope (SEM) was used to explore the effects of different light-emitting diodes (LEDs) on graft union formation in grafted tomato. In addition, the expression genes related to Auxin hormone signaling pathway (SAUR67, AUX1, ARF30, and LAX3) was investigated. The obtained results showed that the concrescence process occurred faster under R7:B3 light conditions, as compared to blue (B) and white fluorescent (WFL) lights. Red light application caused a delay in the vascular tissue differentiation, which may lead to callus development on both sides, causing junctional failure and resulting in ineffective graft junctional arrangement. The expression of genes related to Auxin hormone significantly increased by R7:B3 application. We suggest that LED spectra affects the graft development of tomato plants and can improve the performance of grafted tomato seedlings.
- Published
- 2021