数字农科院2.0

Molecular Network for Regulation of Ovule Number in Plants

文献类型： 外文期刊

作者： Muslim Qadir ; Xinfa Wang; Syed Rehmat Ullah Shah; Xue-Rong Zhou; Jiaqin Shi; Hanzhong Wang

关键词： ovule number genes; molecular network; auxin; cytokinins; brassinosteroids; gibberellin; other pro-teinstranscription factors; micro-RNA

期刊名称： INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES

ISSN： 1422-0067

年卷期： 2021 年

页码：

收录情况： JCR（2021版）

摘要： In seed-bearing plants, the ovule (“small egg“) is the organ within the gynoecium that develops into a seed after fertilization. The gynoecium located in the inner compartment of the flower turns into a fruit. The number of ovules in the ovary determines the upper limit or the potential of seed number per fruit in plants, greatly affecting the final seed yield. Ovule number is an important adaptive characteristics for plant evolution and an agronomic trait for crop improvement. There-fore, understanding the mechanism and pathways of ovule number regulation becomes a signifi-cant research aspect in plant science. This review summarizes the ovule number regulators and their regulatory mechanisms and pathways. Specially, we construct the firstan integrated molec-ular network for ovule number regulation is constructed, in which phytohormones played a cen-tral role, followed by transcription factors, enzymes, other protein and micro-RNA. Of them, AUX, BR and CK are positive regulator of ovule number, whereas GA acts negatively on it. Interestingly, many ovule number regulators have conserved functions across several plant taxa, which should be the targets of genetic improvement via breeding or gene editing. Many ovule number regula-tors identified to date are involved in the diverse biological process, such as ovule primordia for-mation, ovule initiation, patterning, and morphogenesis. The relations between ovule number and related characteristics/traits especially of gynoecium/fruit size, ovule fertility, and final seed num-ber, as well as upcoming research questions, are also discussed. In summary, this review provides a general overview of the present finding in ovule number regulation, which represents a more comprehensive and further in-depth cognition on it.

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