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Grassland rental markets function as a venue for balancing production factors of herder households. This paper jointly determines the socioeconomic factors affecting herders’ grassland rent-in and rent-out behaviors by applying Bivariate Probit Model with clustering standard errors on 422 households’ data from Eastern Inner Mongolia. Results reveal that imbalances in “people-grassland (grass)-livestock-productive assets” are the major determinants of the herder households’ participation in grassland rental markets. Given other factors, an increase of 10 thousand yuan in a household’ productive assets renders an increase/decrease in their rent-in/rent-out participation likelihood by 1.0% and 2.0%, respectively; an increase of 100 standard sheep unit may bring about 4% increase in rent-in participation and 0.6% decrease in rent-out participation; an increase of 100 hm 2 in hayfields may decrease and increase the likelihood of rent-in and rent-out participation by 13% and 3%, respectively; an increase of 1.0% in ratio of non-livestock income may decrease propensity of rent-in by 0.34%, and increase propensity of rent-out by 0.2%. In addition, the education and Chinese level of household head, and the available family labor encourage participation in grassland rent-in market. Main findings help facilitate better allocation of herders’ livelihood assets by participating the functional grassland rental markets. [ABSTRACT FROM AUTHOR]

Leymus chinensis , a perennial native forage grass, is widely distributed in the steppes of Inner Mongolia as the dominant species. The main reproductive strategy of this grass is clonal propagation, which occurs via the proliferation of subterranean horizontal stems known as rhizomes. To elucidate the mechanism underlying rhizome development in this grass, we collected 60 accessions of L. chinensis and evaluated their rhizome development. One accession, which we named SR-74 (Strong Rhizomes), had significantly better rhizome development capacity than the accession WR-16 (Weak Rhizomes) in terms of rhizome number, total and primary rhizome length, and number of rhizome seedlings. Rhizome elongation was positively correlated with the number of internodes in the rhizome, which affected plant biomass. Compared to WR-16, SR-74 had higher rhizome tip hardness, higher abundance of transcripts participating in the biosynthesis of cell wall components, and higher levels of the metabolites L-phenylalanine, trans-cinnamic acid, 3-coumaric acid, ferulic acid, and coniferin. These metabolites in the phenylpropanoid biosynthesis pathway are precursors of lignin. In addition, SR-74 rhizomes contained higher amounts of auxin and auxin metabolites, including L-Trp, IPA, IBA, IAA and IAA-Asp, as well as upregulated expression of the auxin biosynthesis and signaling genes YUCCA6 , YUCCA8 , YUCCA10 , YUCCA11 , PIN1 , PIN2 , UGT1 , UGT2 , UGT4 , UGT10 , GH3 , IAA7 , IAA23 , and IAA30. We propose a network between auxin signaling and the cell wall underlying rhizome development in L. chinensis. [ABSTRACT FROM AUTHOR]