Funding for this research was provided by:
National Natural Science Foundation of China (31770476, 314704651)
Central Public-interest Scientific Institution Basal Research Fund for Chinese Academy of Tropical Agricultural Sciences (1630052019020)
the China Agriculture Research System (CARS-32)
Received: 14 February 2019
Accepted: 26 April 2019
First Online: 22 May 2019
Ethics approval and consent to participate
: Not applicable. Neither human or animal subjects, human or animal materials nor human or animal data were used on this manuscript. The authors declared that experimental research works on the plants described in this paper comply with institutional, national and international guidelines.
: Not applicable.
: The authors declare that they have no competing interests.
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