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<p>Calcium is an essential ion for plant growth, playing structural roles in the cell wall, regulating membrane transport, and participating in signaling pathways and stress responses. In plants, it frequently occurs as crystals in various organs, where it contributes to calcium homeostasis and may provide calcium ions for pollen germination, thus enhancing reproductive efficiency. This study aimed to analyze the presence and abundance of raphides within crystal idioblasts at different stages of anther development in <i>Dyckia strehliana</i> and <i>D. polyclada</i>. Additionally, it sought to characterize the dynamics of crystal formation and resorption, highlighting their potential association with key embryological events. The number of raphides varied throughout anther development in both species, with a significant reduction observed in dehiscent anthers. The differentiation and formation of crystal idioblasts appear to be closely linked to specific developmental stages. Moreover, the resorption of calcium crystals seems to accompany certain phases of the embryological process and may be associated with critical structural changes.</p>

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Distribution and absorption of calcium oxalate crystals in the form of raphides in anthers of Dyckia strehliana and Dyckia polyclada (Bromeliaceae)

  • 期刊论文

  • 发表日期：

    2025年8月29日

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  • Roberta Maidana da Silva,
  • João Marcelo Santos de Oliveira

摘要

Calcium is an essential ion for plant growth, playing structural roles in the cell wall, regulating membrane transport, and participating in signaling pathways and stress responses. In plants, it frequently occurs as crystals in various organs, where it contributes to calcium homeostasis and may provide calcium ions for pollen germination, thus enhancing reproductive efficiency. This study aimed to analyze the presence and abundance of raphides within crystal idioblasts at different stages of anther development in Dyckia strehliana and D. polyclada. Additionally, it sought to characterize the dynamics of crystal formation and resorption, highlighting their potential association with key embryological events. The number of raphides varied throughout anther development in both species, with a significant reduction observed in dehiscent anthers. The differentiation and formation of crystal idioblasts appear to be closely linked to specific developmental stages. Moreover, the resorption of calcium crystals seems to accompany certain phases of the embryological process and may be associated with critical structural changes.