浙江农业学报 ›› 2024, Vol. 36 ›› Issue (11): 2510-2520.DOI: 10.3969/j.issn.1004-1524.20231338
赵凌吉1(), 廖香娇1, 刘德春1, 胡威1, 匡柳青1, 宋杰1, 易明亮2, 刘勇1,*(
), 杨莉1,*(
)
收稿日期:
2023-11-27
出版日期:
2024-11-25
发布日期:
2024-11-27
作者简介:
赵凌吉(1998—),男,山西晋中人,硕士研究生,主要从事果树生理品质研究。E-mail:1219980160@qq.com
通讯作者:
*刘勇, E-mail:liuyongjxau@163.com;杨莉, E-mail: yangli526526@126.com
基金资助:
ZHAO Lingji1(), LIAO Xiangjiao1, LIU Dechun1, HU Wei1, KUANG Liuqing1, SONG Jie1, YI Mingliang2, LIU Yong1,*(
), YANG Li1,*(
)
Received:
2023-11-27
Online:
2024-11-25
Published:
2024-11-27
摘要:
为明确江西省地方特色品种-桃溪蜜柚果实常温贮藏期间有机酸的变化规律,初步探讨引起桃溪蜜柚贮藏期有机酸变化的原因,研究以桃溪蜜柚贮藏期果实为材料,应用高效液相色谱技术(HPLC)测定采后贮藏0~150 d果实中有机酸组分及含量,并通过实时荧光定量PCR(qRT-PCR)分析柠檬酸合成、降解和转运相关基因表达量的变化。结果表明:桃溪蜜柚果实在贮藏期间大部分时期的总有机酸含量高于贮藏0 d,而糖酸比在整个贮藏期间低于贮藏0 d,存在果实“返酸”现象,这可能是桃溪蜜柚采后贮藏品质下降的主要原因。桃溪蜜柚柠檬酸含量占总有机酸含量的 78.51%~80.32%,且二者变化趋势一致。柠檬酸含量在贮藏初期存在较大的变化波动,在贮藏后40 d达到最大值。柠檬酸合成基因PEPC1/2及CS1、液泡 H+-ATPase质子泵基因CmVHA-c4和液泡 H+-焦磷酸酶质子泵基因CmVHP2与柠檬酸积累大致呈现相似的变化趋势,而柠檬酸降解基因CmGAD5和阳离子/H+交换基因CmCHX与柠檬酸积累呈现相反的变化趋势,这可能与桃溪蜜柚贮藏初期柠檬酸积累有关。因此,桃溪蜜柚贮藏期间有机酸含量增加、糖酸比下降造成了果实“返酸”现象,而柠檬酸在其中起到了重要作用,其在贮藏期间的积累主要与柠檬酸合成相关基因CmPEPC1/2和CmCS1、降解相关基因CmGAD5以及转运相关基因CmCHX、CmVHA-c4和CmVHP2有关。
中图分类号:
赵凌吉, 廖香娇, 刘德春, 胡威, 匡柳青, 宋杰, 易明亮, 刘勇, 杨莉. 桃溪蜜柚果实贮藏期有机酸含量变化及相关基因表达分析[J]. 浙江农业学报, 2024, 36(11): 2510-2520.
ZHAO Lingji, LIAO Xiangjiao, LIU Dechun, HU Wei, KUANG Liuqing, SONG Jie, YI Mingliang, LIU Yong, YANG Li. Changes of organic acid content in Taoxi pomelo fruits during the storage period and citric acid related gene expression analysis[J]. Acta Agriculturae Zhejiangensis, 2024, 36(11): 2510-2520.
图1 桃溪蜜柚果实贮藏过程中总有机酸含量动态变化 不同小写字母表示总有机酸含量在整个贮藏期的动态差异(P<0.05)。下同。
Fig.1 Dynamic changes of total organic acid content in Taoxi pomelo during storage Different lowercase letters indicate the dynamic differences in total organic acid content throughout the storage period (P<0.05). The same as below.
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