Doctoral students Tian Lu and Liu Leru of the Energy Plant Research Group of the Agricultural Center of the South China Botanical Garden of the Chinese Academy of Sciences, under the guidance of their supervisors, Associate Researcher Chen Yaping and Researcher Wu Guojiang, discovered that pinitol transporters regulate the development of nodules by influencing the osmotic pressure of nodule-infected cells
Plant-microbe symbiotic nitrogen fixation can provide a directly available nitrogen source for plant growth and play an important role in maintaining global food security and ecological security
The researchers isolated 14 polyol transporters (LjPLT1-LjPLT14) in Lotus japonicus, analyzed the molecular biological characteristics of the polyol transporter family, and conducted detailed functional studies on LjPLT11 specifically expressed in root nodules
LjPLT11 The expression in the hexose transporter deficient yeast LjPLT11 attestation LjPLT11 non-energy-dependent, xylitol, inositol two kinds of methyl O- (methyl loose and inositol), galactose, and xylose as a substrate Sugar alcohol transporter
LjPLT11 LjPLT11 LjPLT11 Strangely, under the condition of sufficient nitrogen, reducing the expression of LjPLT11 can accelerate plant growth.
LjPLT11 LjPLT11 Because rhizobia cannot directly use pinitol, and the symbiotic space between the bacteria and the bacteroid membrane needs to maintain osmotic balance to maintain the normal exchange of nutrients inside and outside PBS, the researchers isolated the bacteroid and measured the internal The osmotic pressure inside and outside the bacteria showed that reducing the expression of LjPLT11 changed the pinitol content and at the same time increased the osmotic pressure of the infecting cells in the four-week-old nodules, while the osmotic pressure in the bacteroids decreased
LjPLT11 LjPLT11i In summary, it is shown that LjPLT11 , which is located in the peribacteroid membrane, regulates the osmotic balance of the symbiont space by mediating the transport of D-pinitol in the infecting cell, thereby maintaining the stability of the bacteroid membrane
LjPLT11 Related paper information: https://doi.
https://doi.
org/10.
1093/jxb/erab402
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