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Article|17 May 2022|OPEN
Histology and transcriptomic profiling reveal the dynamics of seed coat and endosperm formation in tree peony (Paeonia ostii)
Jing Sun1 , Haixia Guo1 , Mi Liu1 , Ming Chen1 , Mengyuan Zhu1 , Datong Liu2 and Jun Tao,1 ,
1Jiangsu Key Laboratory of Crop Genetics and Physiology, College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
2Key Laboratory of Wheat Biology and Genetic Improvement for the Low & Middle Yangtze Valley, Ministry of Agriculture/Lixiahe Agricultural Institute of Jiangsu Province, Yangzhou 225007, China
*Corresponding author. E-mail:

Horticulture Research 9,
Article number: uhac106 (2022)
Views: 100

Received: 25 Oct 2021
Accepted: 23 Apr 2022
Published online: 17 May 2022


Dear Editor,

In recent years, two species of tree peony have been recognized as potential oil crops, Paeonia rockii and Paeonia ostii [1]. In 2011, P. ostii seeds, which contain 27–33% oil, were identified as novel sources of α-linolenic acid (ALA) for seed oil production in China [23]. Interestingly, peony seed reserves are stored in the endosperm rather than the embryo, but little research has focused on peony endosperm development [4]. Traditional edible oil crops such as rapeseed, soybean, and peanut store oil mainly in the embryo, specifically in the cotyledons. By contrast, tree peony produces oil primarily in the endosperm, distinguishing it from traditional oil crops.