Strigolactones (SLs), which are biosynthesized mainly in roots, modulate various aspects of plant growth and development. Here, we review recent research on the role of SLs and their cross-regulation with auxin, cytokinin, and ethylene in the modulation of root growth and development. Under nutrient-sufficient conditions, SLs regulate the elongation of primary roots and inhibit adventitious root formation in eudicot plants. SLs promote the elongation of seminal roots and increase the number of adventitious roots in grass plants in the short term, while inhibiting lateral root development in both grass and eudicot plants. The effects of SLs on the elongation of root hairs are variable and depend on plant species, growth conditions, and SL concentration. Nitrogen or phosphate deficiency induces the accumulation of endoge-nous SLs, modulates root growth and development. Genetic analyses indicate cross-regulation of SLs with auxin, cytokinin, and ethylene in regulation of root growth and development. We discuss the implications of these studies and consider their potential for exploiting the components of SL signaling for the design of crop plants with more efficient soil-resource utilization.

Huwei Sun;Weiqiang Li;David J.Burritt;Hongtao Tian;Heng Zhang;Xiaohan Liang;Yuchen Miao;Mohammad Golam Mostofa;Lam-Son Phan Tran

Laboratory of Rice Biology in Henan Province,Collaborative Innovation Center of Henan Grain Crops,College of Agronomy,Henan Agricultural University,Zhengzhou 450046,Henan,China;Jilin Da'an Agro-ecosystem National Observation Research Station,Changchun Jingyuetan Remote Sensing Experiment Station,Key Laboratory of Mollisols Agroecology,Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130102,Jilin,China;State Key Laboratory of Cotton Biology,Henan Joint International Laboratory for Crop Multi-Omics Research,School of Life Sciences,Henan University,Kaifeng 475001,Henan,China;Department of Botany,University of Otago,Dunedin 9054,New Zealande Institute of Genomics for Crop Abiotic Stress Tolerance,Department of Plant and Soil Science,Texas Tech University,Lubbock,TX 79409,USA;Institute of Research and Development,Duy Tan University,03 Quang Trung,Da Nang 550000,Vietnam

作物学报（英文版）

[1]Huwei Sun;Weiqiang Li;David J.Burritt;Hongtao Tian;Heng Zhang;Xiaohan Liang;Yuchen Miao;Mohammad Golam Mostofa;Lam-Son Phan Tran-.Strigolactones interact with other phytohormones to modulate plant root growth and development)[J].作物学报（英文版）,2022(06):1517-1527

eudicot

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