Seed priming with microalgae enhances plant productivity and rhizosphere health  

作　　者：Sudharsanam Abinandan Kuppan Praveen Kadiyala Venkateswarlu Mallavarapu Megharaj 

机构地区：[1]Global Centre for Environmental Remediation(GCER),School of Environmental and Life Sciences,College of Engineering,Science and Environment,ATC Building,University of Newcastle,Callaghan,NSW 2308,Australia [2]crc for Contamination Assessment and Remediation of Environment(crcCARE),University of Newcastle,ATC Building,Callaghan,NSW 2308,Australia [3]Formerly Department of Microbiology,Sri Krishnadevaraya University,Anantapuramu 515003,India

出　　处：《Soil Ecology Letters》2025年第1期207-219,共13页土壤生态学快报(英文)

基　　金：supported by Wine Australia with levies from Australia’s grape growers and winemakers and matching funds from the Australian Government.

摘　　要：Microalgae play a key role as primary colonizers of soil,enhancing plant growth and improving soil health.Seed priming is a widely used method to improve seedling performance,counteract soilrelated stresses,and boost plant productivity.Here we investigated the impact of priming dwarf pea seeds with live cells or disrupted cell mass of two microalgae,Desmodesmus sp.MAS1 and Heterochlorella sp.MAS3,on plant growth response and rhizosphere health.Plant growth metrics,rhizosphere health parameters,and nutrient status indicators were investigated 21 days after sowing in two different soils(designated as A and B)with varying pH.Results revealed that priming significantly improved the biochemistry of rhizosphere in soil B(pH 8),with over 30%increases in leaf count and fresh weight compared to soil A(pH 6).While flowering rates remained low,priming with strain MAS1 significantly enhanced chlorophyll(20%),indole-3-acetic acid(61%),and dehydrogenase activity(50%).Furthermore,strain MAS1 boosted nutrient availability in the rhizosphere,with a 30%–60%increase in carbon and nitrogen levels,promoting exopolysaccharide release.Our findings thus demonstrate the potential of seed priming with microalgae in modulating rhizosphere health,thereby enhancing plant growth and productivity.

关 键 词：RHIZOSPHERE seed priming soil health MICROALGAE seaweed extract 

分 类 号：S15[农业科学—土壤学]