TURF & MEADOW
Biochemical and physiological process
Humic substances influence several metabolic processes such as photosynthesis, respiration, nucleic acid synthesis and ion uptake. Humic acid influences the production of RNA, which is essential for many biochemical processes in the cell. Humic acid also stimulates the activities of some enzymes.
Foliar application of humic acid solution stimulated the photosynthetic capacity of creeping bentgrass, particularly during the summer when photosynthetic activity had declined because of environmental stress.
Studies showed that foliar application of humic acid on turfgrass significantly enhances the presence of various antioxidants in leaves.
Research has shown that materials with hormonal activity, such as humic substances, stimulate production of antioxidants and enhance photosynthetic activity, resulting in greater turfgrass tolerance of abiotic and biotic stresses, including infection.
Therefore, using humic substances that reduce the impact of environmental stresses could be a valuable component of an integrated pest management strategy in turfgrass culture.