Postharvest heat treatment delays chlorophyll degradation and maintains quality in Thai lime (Citrus aurantifolia Swingle cv. Paan) fruit

Methyl salicylate delays peel yellowing of ‘Zaosu’ pear (Pyrus bretschneideri) during storage by regulating chlorophyll metabolism and maintaining chloroplast ultrastructure

“…Yamauchi et al believed that Chl‐POX participates in chlorophyll breakdown and its activity increases greatly during the storage of horticultural crops undergoing senescence. Similar conclusions were reached concerning Chl‐POX in Thai lime and broccoli …”

“…However, in ‘Yali’, ‘Emerald’, and ‘Jingbai’ pears, RCCR mRNA was not upregulated during chlorophyll degradation, which might indicate a difference among pear varieties . In the presence of H 2 O 2 and phenolic compounds, Chl‐POX oxidized chlorophyll a to degreen through alternative pathways, forming C13‐hydroxychlorophyll a, which was not accumulated as an intermediate . Our study showed that the Chl‐POX activity in the treated pears was significantly suppressed (Fig.…”

“…Chlorophyll degradation is an important physiological catabolism of pigment during plant senescence and fruit ripening. However, in some cultivars, such as ‘Yali’ pear, Thai lime, broccoli, Chinese kale, and spinach, it is a negative characteristic because yellowing resulting from chlorophyll breakdown often leads to a shorter shelf life and diminished commercial value associated with dramatic changes in color, texture, flavor, and aroma of the cultivars, which has a direct effect on food supply and health. It is therefore important to develop techniques that delay or suppress chlorophyll degradation.…”

“…In vitro , NOL, rather than NYC1, shows CBR activity . In some plants, like citrus fruit and green lime, CLH‐catalyzed removal of phytol is important for natural chlorophyll degradation, whereas CLH activity is dispensable in other cases, such as in ‘Yali’ pears and Arabidopsis leaves . Recently, PPH was identified as the key enzyme that dephytylates pheophytin to yield pheophorbide, and pph‐1 mutants cause a stay‐green (SGR) phenotype in senescent Arabidopsis leaves .…”

Anticancer activity of key lime, Citrus aurantifolia

“…[3] Products of citrus fruit such as essential oil and pectin of fruit peel are used in the cosmetic[4] and pharmaceutical industries. [56] Citrus was studied in many countries such as Cameroon,[7] Iran,[8] Italy,[9] Nigeria,[10] Taiwan,[11] Thailand,[12] and Vietnam. [13] There are many species in the genus of Citrus , the most well-known citrus species are Citrus aurantifolia (key lime), C. hystrix (makrut lime), C. limonia (Mandarin lime), C. limon (lemon), C. jambhiri (rough lemon), C. sinensis (sweet orange), C. aurantium (sour orange), C. limetta (bitter orange), C. macroptera (wild orange), C. tachibana (tachibana orange), C. maxima (shaddock), C. medica (citron), C. nobilis (tangor), C. paradise (grapefruit), C. reticulata (tangerine), and C. tangelo (tangelo).…”