Abstract
The formation of adventitious roots (ARs) is an important process for lotus (Nelumbo nucifera), which does not have a well-formed main root. In lotus, the removal of leaves above the waterline significantly promoted AR formation, while the removal of leaves below the waterline inhibited AR formation. Proteins were identified using isobaric tags for relative and absolute quantization technique. The number of proteins decreased with increasing sequencing coverage, and most of the identified proteins had fewer than 10 peptides. In the A1/A0 and A2/A1 stages, 661 and 154 proteins showed increased abundance, respectively, and 498 and 111 proteins showed decreased abundance, respectively. In the B1/B0 and B2/B1 stages, 498 and 436 proteins showed increased abundance, respectively, and 358 and 348 proteins showed decreased abundance, respectively. Among the proteins showing large differences in abundance, 17 were identified as being related to AR formation. Proteins involved in the glycolytic pathway and the citrate cycle showed differences in abundance between the two types of leaf removal. The transcriptional levels of nine genes encoding relevant proteins were assessed by quantitative polymerase chain reaction. The results of this study illustrate the changes in metabolism after different types of leaf removal during AR formation in lotus.
Correction note
Correction added after online publication September 4, 2018: The first name and last name of the authors were mistakenly printed in reverse order.
Acknowledgments
We extend our thanks to some members of BIG for their cooperation in obtaining the data of AR formation by iTRAQ technique of the lotus root. The authors thank Edanz Group Ltd for their editorial assistance. This work was supported by Innovation Project of Jiangsu Province and Yangzhou University (SJCX17_0629), the modern agriculture of Yangzhou (YZ2017044) and the Natural Science Foundation of Jiangsu Province, China (BK20151307).
Conflict of interest statement: The authors declare no conflict of interest.
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