Comparison of carotenoid,chlorophyll concentrations and their biosynthetic transcript levels in different coloured cauliflower  

作　　者：Fatemeh Izadpanah Katja Frede Forouzandeh Soltani Susanne Baldermann 

机构地区：[1]Food Chemistry and Human Nutrition,Leibniz Institute of Vegetable and Ornamental Crops,Theodor-Echtermeyer-Weg 1,14979 Großbeeren,Germany [2]Department of Food Chemistry,Institute of Nutritional Sciences,University of Potsdam,Arthur-Scheunert-Allee 114-116,14558 Nuthetal,Germany [3]Department of Horticultural Science,University of Tehran,Daneshkade Ave,31587-77871,Karaj,Iran [4]Faculty of Life Sciences:Food,Nutrition and Health,Food Metabolome,University of Bayreuth,Fritz-Hornschuch-Straße13,95326 Kulmbach,Germany

出　　处：《Horticultural Plant Journal》2024年第3期743-754,共12页园艺学报（英文版）

基　　金：supported by the Federal Office for Agriculture and Food(BLE)of Germany[Grant No.2816DOKI07(Carcauli)]。

摘　　要：Carotenoids and chlorophylls are among the most widely distributed pigments in nature that play essential roles in the photosynthetic apparatus and confer diverse colours in plants.Among all vegetables,cauliflower(Brassica oleracea L.ssp.var.botrytis)is rich in phytochemicals and is an important crop grown all over the world.This study investigates carotenoid and chlorophyll concentrations in differently pigmented cultivars and elucidates the role of transcriptional regulation of carotenoid accumulation including lutein andβ-carotene.Here,we characterised changes in pigments by UHPLC-DAD-ToF-MS and changes in transcript levels of carotenoid metabolic genes by qRT-PCR in florets and leaves of orange(‘Jaffa'and‘Sunset'),purple(‘Di Sicilia Violetto'and‘Graffiti'),green(‘Trevi')and white(‘Clapton')cultivars.Transcript levels of all carotenoid metabolic genes showed different transcript level patterns in the leaves and florets.Compared to the other cultivars,the orange cultivars had the highest levels ofβ-carotene in the florets and lutein in the leaves resulting in changes lutein/β-carotene ratios.In the green cultivar,higher transcript levels were also found,especially for phytoene synthase and phytoene desaturase genes of the core biosynthesis pathway.However,no increased carotenoid concentrations were observed,possibly due to a higher carotenoid turnover induced by the carotenoid cleavage dioxygenase 4 in the green cultivar.In the white(‘Clapton')and purple(‘Di Sicilia Violetto'and‘Graffiti')cultivars the phytoene desaturase transcript levels as well as carotenoid concentrations were low.Chlorophyll concentrations changed in trend comparable to the carotenoid concentrations and were only significantly lower in the leaves of the orange cultivar‘Jaffa'.Also,the chlorophyll a/b ratio changed in‘Jaffa'.In florets the highest chlorophylls concentrations were observed for the green cultivar(‘Trevi')and the purple cultivar(‘Di Sicilia Violetto').Taken together,the study demonstrates the compl

关 键 词：Brassica oleracea L.var.botrytis CAROTENOID LUTEIN Β-CAROTENE BIOSYNTHESIS qRT-PCR 

分 类 号：S635.3[农业科学—蔬菜学]