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Open AccessArticle

Effect of Prohydrojasmon on the Growth of Eggplant and Komatsuna

1
Alliance for Research on the Mediterranean and North Africa (ARENA), University of Tsukuba, Tsukuba 305-8572, Japan
2
Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba 305-8572, Japan
3
Specialty Chemical Division, Zeon Corporation, Chiyoda-ku, Tokyo 100-8246, Japan
4
Headquarter, Zeon Corporation, Chiyoda-ku, Tokyo 100-8246, Japan
*
Author to whom correspondence should be addressed.
Plants 2020, 9(10), 1368; https://doi.org/10.3390/plants9101368
Received: 8 September 2020 / Revised: 13 October 2020 / Accepted: 13 October 2020 / Published: 15 October 2020
Prohydrojasmon (PDJ) can improve the polyphenol and anthocyanin content and antioxidant activity of some crop plants, but it also shows a suppressive effect on the plant growth. This study aimed to investigate the inhibitory effect of PDJ on the growth of two crop plants: komatsuna (Brassica rapa var. periviridis) and eggplant (Solanum melongena). We applied various concentrations of PDJ drip-wise or by spraying to eggplant and komatsuna seedlings and made detailed observations of growth. In general, no significant suppressive effect of PDJ was observed in the aerial parts in both plants. However, a significant inhibitory effect was found in roots treated with PDJ at concentrations of 600 and 1000 ppm. Interestingly, komatsuna treated with PDJ at a concentration of 200 ppm in both approaches resulted in a significant increase in root weight up to 37%. At a concentration range of 200–400 ppm, PDJ showed no inhibitory effects, and in some cases slightly promoted root growth. Therefore, this could be the recommended concentration range. We conclude that application of PDJ can still be beneficial to the vegetable crops without causing serious inhibition or suppression effects on the growth, as long as it is kept at rather low concentrations. View Full-Text
Keywords: prohydrojasmon; inhibitory effect; plant hormone; komatsuna (Brassica rapa var. periviridis); eggplant (Solanum melongena) prohydrojasmon; inhibitory effect; plant hormone; komatsuna (Brassica rapa var. periviridis); eggplant (Solanum melongena)
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MDPI and ACS Style

Azis, H.R.; Takahashi, S.; Koshiyama, M.; Fujisawa, H.; Isoda, H. Effect of Prohydrojasmon on the Growth of Eggplant and Komatsuna. Plants 2020, 9, 1368.

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