The absorption of iodine from 5-iodosalicylic acid by hydroponically grown lettuce

Organic iodine supply affects tomato plants differently than inorganic iodine

“…4D). Previous research, conducted by Smoleń et al (2017), also showed a significant effect of the compounds 5-ISA and SA on the dry matter content in lettuce plants cultivated in the NFT system. It is particularly interesting that an increase in the dry matter content in leaves was observed in the treatment with 5-ISA; where this compound at a dose of 40 μM also showed toxic effect on lettuce plants and led to decrease in the fresh weight of the lettuce plants.…”

“…It is likely that the harmfulness of organoiodine compounds to plants also depends on the dose and growing conditions. A previous study, conducted by Smoleń et al () on lettuce plants cultivated in an NFT system showed that 5‐ISA used at doses of 1.6 and 8 μM was safe and did not negatively affect the growth and development of plants, while at a dose of 40 μM, it showed toxic effects on lettuce plants.…”

“…Study conducted by Smoleń et al () on lettuce biofortification indicated a better uptake and accumulation of iodine from 5‐ISA applied in a dose of 40 μM I when compared to KIO 3 applied alone or together with SA. The iodine level in lettuce roots grown in a nutrient solution containing 5‐ISA at a dose of 8 μM I did not differ significantly from the treatments with KIO 3 or KIO 3 + SA.…”

“…However, the iodine content in leaves from this treatment was higher than after the application of KIO 3 . In lettuce plants treated with organoiodine compounds, such as 5‐ISA, iodine accumulated both in roots and leaves (Smoleń et al ). Comparable to the current study the highest value of iodine in upper parts of plant was noticed after KI application, but after 5‐ISA application the higher iodine content was observed in roots in comparison with the upper parts of tomato plants.…”

“…It is likely that the harmfulness of organoiodine compounds to plants also depends on the dose and growing conditions. A previous study, conducted by Smoleń et al (2017) on lettuce plants cultivated in an NFT system showed that 5-ISA used at doses of 1.6 and 8 μM was safe and did not negatively affect the growth and development of plants, while at a dose of 40 μM, it showed toxic effects on lettuce plants. Previous studies on iodine biofortification of tomato documented the lack of influence of KI or KIO 3 application on the content of dry matter in tomato fruits (Kiferle et al 2013, Smoleń et al 2015.…”