Comparative studies of leaf surface chemical biosynthesis in different tobacco cultivars

The H gene promotes the development of glandular trichomes with long stalks in tobacco through endogenous hormone signaling

“…LGT are complex, containing aromatic compounds, sucrose esters, alkanes, and fatty acids [40] . The density and morphology of the three trichome types vary, leading to differences in the chemical composition of the leaf surface and resistance to insects [41] . Diterpenoid compounds in glandular trichome secretions can enhance tobacco's resistance to insects [42] , and the content of caryophyllene diols (CBT-diols) in the secretions is positively correlated with the attractiveness of tobacco to aphids [43] .…”

“…A considerable amount of research on the control of tobacco pests and diseases has been conducted using modern biotechnology. Diterpenoid compounds secreted by the glandular trichomes of tobacco can enhance the plant's resistance to insects [42] , and the content of cembratrien-diols (CBT-diols) in the secretions is positively correlated with the plant's ability to attract aphids [43] . NtCycB2 negatively regulates the formation of trichomes and the secretion of diterpenoids and sugars, reducing resistance to aphids [44] .…”

Cloning, characterization and functional analysis of NtMYB306a gene reveals its role in wax alkane biosynthesis of tobacco trichomes and stress tolerance

“…According to Huang et al. (2018) , leaves of 5-mouth-old tobacco plants were immersed in dichloromethane (CH 2 Cl 2 ) solution three times for 2 s each time, which were combined and added with n-tetracosane (C24 alkane) as an internal reference.…”

“…Numerous studies have documented the important roles of trichomes in plant resistance to biotic and abiotic stresses, including drought and ultraviolet radiation ( Wagner, 1991 ; Serna and Martin, 2006 ; McDowell et al., 2011 ; Glas et al., 2012 ). The trichomes of Tobacco ( Nicotiana tabacum L.), an emerging model system for plant biology over the past several decades, are morphologically divided into three types: tall glandular trichome (TGT), short glandular trichome (SGT), and non-glandular trichome (NGT) ( Wang et al., 2004 ; Huang et al., 2018 ; Wang et al., 2021b ). In tobacco, many compounds such as cembranoids, sucrose esters, alkanes, and fatty acids are synthesized and secreted by trichomes, which are considered to be the main components of tobacco leaf exudates.…”

“…In tobacco, many compounds such as cembranoids, sucrose esters, alkanes, and fatty acids are synthesized and secreted by trichomes, which are considered to be the main components of tobacco leaf exudates. In addition to inducing stress resistance in tobacco, they are also reported to be the precursors of important compounds produced in the process of leaf mellowing and are associated with the aroma of tobacco ( Heemann et al., 1983 ; Johnson et al., 1985 ; Wagner, 1991 ; Sallets et al., 2014 ; Huang et al., 2018 ). Additionally, in flavology, alkanes produced from plant been shown to have a significant impact on flavor release and odor switch ( Fu et al., 2021b ).…”