Elevated temperature and drought stress significantly affect fruit quality and activity of anthocyanin-related enzymes in jujube (Ziziphus jujuba Mill. cv. 'Lingwuchangzao').

Results Total sugar, organic acid content and sugar-acid ratio There was no significant difference in the soluble sugar content among the different temperature and drought stress in the stages of white ripening (S1) and fruit coloration (S2), but both elevated temperature and drought had significant (P<0.05) and highly significant (P<0.01) effects on soluble sugar content in S3 ( Table 2 ).

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