Effect of Sub-irrigation Frequency of Closed Seedling-production System on Changes in Xylem Pressure Potential and Incidence of Intumescence in Tomato Seedlings

Abstract

　In this study, I investigated the effect of sub-irrigation frequency on changes in xylem pressure potential and intumescence occurrence in tomato seedlings grow in closed seedling-production systems. Further, I explored the relationship between irrigation frequency and physiological responses in tomato seedlings. The tomato seeds were sown in a closed seedling-production system and subjected to varying irrigation frequencies. The results revealed that increasing irrigation frequency suppressed the decline in soil moisture content and mitigated the rise in xylem pressure potential, when humidity rises concurrently with irrigation. Moreover, higher irrigation frequency correlated with reduced incidence of intumescence during early growth stages and accelerated seedling growth. Thus, optimizing irrigation strategies is crucial to mitigate fluctuations in xylem pressure potential and suppress intumescence in closed seedling-production systems.