Supported by the National Natural Science Foundation of China (39470432).Acknowledgements We thank Cheng-Hou Lou and Richard Dawson (ChinaAgricultural University) for their writing assistance.
We investigated the role of the "sieve tube-companion cell complex" lining the tube periphery, particularly the microfilament and microtubule, in assisting the pushing of phloem sap flow. We made a simple phloem tra...