Effects of Increasing Ozone Levels on Leaf Biochemistry and Flower Development in Petunia Varieties with Different Floral Pigmentation

文献类型： 外文期刊

第一作者： Yang, Ning

作者： Yang, Ning;Wang, Xiaoke;Cotrozzi, Lorenzo;Nali, Cristina;Pellegrini, Elisa;Bianchi, Gemma;Pisuttu, Claudia;Zheng, Feixiang

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关键词： flavonoids; flower diameter and longevity; ornamental plants; Petunia hybrida; photosynthetic pigments; HPLC; chlorophyll; ozone pollution

期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）

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年卷期： 2024 年 14 卷 9 期

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收录情况： SCI

摘要： In this work, we assessed the effects of increasing ozone (O-3) on four petunia varieties with different floral pigmentation (pink, red, rose-red, and white). Plants were exposed, in open-top chambers located in China, to three O(3 )concentrations, i.e., (i) ambient air (AA), (ii) AA + 60 ppb O-3 (AA + 60), and (iii) AA + 120 ppb O-3 (AA + 120), for 85 days (9 h day(-1)). Flower diameter and duration were assessed, together with leaf chlorophyll and flavonoid contents. White petunia showed a reduced flower diameter and longevity under AA + 60 (-7 and -6%, respectively, in comparison to AA), whereas pink and red petunias only showed this under AA + 120 (-8 and -7%, on average, respectively). Chlorophyll loss occurred in all varieties under AA + 60 (-30%, on average), and at AA + 120 in white and red petunias (-54%, on average). The total flavonoid content in the pink and white varieties increased only under AA + 120 (around +85%), while it grew at both AA + 60 and AA + 120 (+92% and two-fold higher, respectively) in the red variety. Increasing O-3 concentrations did not affect particularly the red-rose variety. The white variety showed the strongest correlations among flower and leaf properties, confirming a variety-related O-3 response, as well as demonstrating that it had the highest O-3 sensitivity.

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