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<p>As an isoform of floral organ development, the development pattern of <i>Rosa chinensis</i> cv. Viridiflora has been paid more attention. In this study, the floral organs of <i>Rosa chinensis</i> cv. Viridiflora were dissected by layer, and the phenotypic indexes and the expression of genes related to floral organ development were analyzed to classify the materials. Finally, with the help of the ‘ABCDE model’ of floral organ development, the identity of each material and the development model were identified. The results showed that: (1) By cluster analysis, the flower organs were divided into four types, namely, the first whorl (I), the second (II) to the sixth (VI) whorl, the centermost material (upper) (VII) and the centermost material (lower) (VIII). (2) The first whorl (I) was mainly regulated by class A gene <i>RcAP2</i> and class E genes <i>AtSEP2</i> and <i>AtSEP3</i>, corresponding to sepals. The second (II) to the sixth (VI) whorl were mainly regulated by class A gene <i>RcAP2</i>, class B gene <i>RcAP3,</i> and class E gene <i>AtSEP2</i>, which correspond to petals. In the centermost material (upper) (VII), class A genes <i>RcAP1</i>, class B genes <i>RcAP3</i> and <i>AtPI</i>, class C genes <i>RcAG,</i> and class E genes <i>AtSEP2</i> and <i>AtSEP3</i> were expressed, corresponding to stamens. The ectopic overexpression of <i>RcAP1</i> may cause the loss of phenotypic characteristics of stamens. The centermost material (lower) (VIII) was co-regulated by class A gene <i>RcAP2</i>, class E gene <i>AtSEP3,</i> and class D gene <i>AtSTK</i>, indicating that it had ovules. It may be that ectopic overexpression of <i>RcAP2</i> leads to incomplete pistil development.</p>

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Modeling of flower development reveals floral organ patterning and identification in Rosa chinensis cv. Viridiflora

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月13日

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  • Meijing Yuan,
  • Shengdie Weng,
  • Rui Wu,
  • Xiaoling Kang,
  • Xiaoxue Hu,
  • Li Du

摘要

As an isoform of floral organ development, the development pattern of Rosa chinensis cv. Viridiflora has been paid more attention. In this study, the floral organs of Rosa chinensis cv. Viridiflora were dissected by layer, and the phenotypic indexes and the expression of genes related to floral organ development were analyzed to classify the materials. Finally, with the help of the ‘ABCDE model’ of floral organ development, the identity of each material and the development model were identified. The results showed that: (1) By cluster analysis, the flower organs were divided into four types, namely, the first whorl (I), the second (II) to the sixth (VI) whorl, the centermost material (upper) (VII) and the centermost material (lower) (VIII). (2) The first whorl (I) was mainly regulated by class A gene RcAP2 and class E genes AtSEP2 and AtSEP3, corresponding to sepals. The second (II) to the sixth (VI) whorl were mainly regulated by class A gene RcAP2, class B gene RcAP3, and class E gene AtSEP2, which correspond to petals. In the centermost material (upper) (VII), class A genes RcAP1, class B genes RcAP3 and AtPI, class C genes RcAG, and class E genes AtSEP2 and AtSEP3 were expressed, corresponding to stamens. The ectopic overexpression of RcAP1 may cause the loss of phenotypic characteristics of stamens. The centermost material (lower) (VIII) was co-regulated by class A gene RcAP2, class E gene AtSEP3, and class D gene AtSTK, indicating that it had ovules. It may be that ectopic overexpression of RcAP2 leads to incomplete pistil development.