Differences in plant growth and leaf sesamin content of the lignan-rich sesame variety ^|^#8216;Gomazou^|^#8217; under continuous light of different wavelengths

Abstract

Sesamin is a major lignan constituent of sesame seeds and beneficial to human health. We previously reported that sesamin is contained in leaves as well as seeds of sesame and proposed that sesame leaves could be a new sesamin source. Growth and constituents of plants are affected by light wavelength. In this study, growth and leaf sesamin content of sesame variety 'Gomazou' were investigated in plants grown under continuous white fluorescent and monochromatic red or blue light emitting diode (LED) light. Under red LED light, plants developed pale-green, epinastic leaves. Compared with white fluorescent light, red LED light promoted stem elongation 1-3 weeks after sowing but retarded it 3-5 weeks after sowing. Under blue LED light, plants exhibited interveinal necrosis in the leaf blades and excessive stem elongation occurred irrespective of plant age. Leaf yields were lower in plants grown under red and blue LED lights relative to those under white fluorescent light. Blue LED light increased leaf sesamin content by 2.0 and 4.5 times compared with white fluorescent and red LED lights, respectively. From these results, we concluded that blue (LED) light may be effective at producing sesaminrich leaves if the unfavorable morphological changes and reduction in growth can be prevented.

Intensity of Sole-source Light-emitting Diodes Affects Growth, Yield, and Quality of Brassicaceae Microgreens

“…High LI-mediated reductions in HL may have important ramifications for microgreen production as shorter HL may increase overall crop robustness and lengthen postharvest shelf life; however, shorter HL can also increase difficulty of harvesting, particularly if harvesting is done by machine. Depending on the importance of HL at harvest, relative to other production metrics (e.g., yield), it may be possible to counteract the LI-induced reductions in HL by using targeted light spectrum treatments such as a reduced photon flux ratio of R to FR light (Blom et al, 1995;Fletcher et al, 2005;Hisamatsu et al, 2008;Mah et al, 2018) or monochromatic blue light treatments (Hata et al, 2013;Hern andez and Kubota, 2016;Kim et al, 2014;Kong et al, 2018) to stretch the plants. Probably the most important harvest metric for commercial microgreen production is fresh yield (i.e., kg (FW)• m -2 ) because microgreens are typically sold on a ''per-FW'' basis.…”

Essences in Metabolic Engineering of Lignan Biosynthesis

“…Unfortunately, the amounts of lignans and their precursor molecules in model plants such as Arabidopsis thaliana and Nicotiana tabacum are quite low. Moreover, plant sources of lignans are frequently limited because of the high cost of plant hunting and collection, poor cultivation systems, long growth phase, and the low lignan content [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. For instance, sesamin, a multifunctional sesame seed lignan, is extracted from sesame seed oil, the most abundant source of this compound.…”

“…Likewise, podophyllotoxin (PTOX), a lignan that is a precursor of semi-synthetic anti-tumor drugs, is isolated from the roots and rhizomes of Podophyllum hexandrum , which is distributed in very limited regions, and is now endangered due to overharvesting and environmental disruption [ 13 ]. In addition, the complicated chemical structures of PTOX and the related compounds ( Figure 1 A) make stereoselective organic synthesis impractical and costly for producing large supplies of these compounds and the resulting high cost [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. These drawbacks indicate the requirement for efficient, stable and sustainable production systems for producing lignans.…”

Furofuran lignans of Artemisia genus: Isolation, biosynthesis and biological activity

“…84 Therewithal, plant sources of lignans are frequently limited because of the high cost of plant collection, poor cultivation systems and long growth phase. [85][86][87][88][89] An exhaustive literature survey on phytochemical reports of the genus Artemisia reveals that the Artemisia species comprises mainly furofuran lignans (2,6-diarylfurofurans). [90][91][92][93][94][95][96][97][98]…”