title: Gene expression profiling of the green seed problem in Soybean.
abstract: BACKGROUND
  Due to the climate change of the past few decades, some agricultural areas in the world are now experiencing new climatic extremes. For soybean, high temperatures and drought stress can potentially lead to the "green seed problem", which is characterized by chlorophyll retention in mature seeds and is associated with lower oil and seed quality, thus negatively impacting the production of soybean seeds.
  
  
  RESULTS
  Here we show that heat and drought stress result in a "mild" stay-green phenotype and impaired expression of the STAY-GREEN 1 and STAY-GREEN 2 (D1, D2), PHEOPHORBIDASE 2 (PPH2) and NON-YELLOW COLORING 1 (NYC1_1) genes in soybean seeds of a susceptible soybean cultivar. We suggest that the higher expression of these genes in fully mature seeds of a tolerant cultivar allows these seeds to cope with stressful conditions and complete chlorophyll degradation.
  
  
  CONCLUSIONS
  The gene expression results obtained in this study represent a significant advance in understanding chlorophyll retention in mature soybean seeds produced under stressful conditions. This will open new research possibilities towards finding molecular markers for breeding programs to produce cultivars which are less susceptible to chlorophyll retention under the hot and dry climate conditions which are increasingly common in the largest soybean production areas of the world.
authors.affiliation: Wageningen Seed Lab, Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, Wageningen, 6708 PB, The Netherlands. renakent@gmail.com.|Departamento de Produção e Melhoramento Vegetal, Faculdade de Ciências Agronômicas-UNESP, Universidade Estadual Paulista, Botucatu, SP, 18.610-307, Brazil. renakent@gmail.com.
authors.forename: Renake N
authors.initials: RN
authors.lastname: Teixeira
authors.affiliation: Wageningen Seed Lab, Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, Wageningen, 6708 PB, The Netherlands. wilco.ligterink@wur.nl.
authors.forename: Wilco
authors.initials: W
authors.lastname: Ligterink
authors.affiliation: Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa de Soja, EMBRAPA Soja, Caixa-postal 231, Londrina, PR, 86001970, Brazil. jose.franca@embrapa.br.
authors.forename: José de B
authors.initials: Jde B
authors.lastname: França-Neto
authors.affiliation: Wageningen Seed Lab, Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, Wageningen, 6708 PB, The Netherlands. henk.hilhorst@wur.nl.
authors.forename: Henk W M
authors.initials: HW
authors.lastname: Hilhorst
authors.affiliation: Departamento de Produção e Melhoramento Vegetal, Faculdade de Ciências Agronômicas-UNESP, Universidade Estadual Paulista, Botucatu, SP, 18.610-307, Brazil. amaraldasilva@fca.unesp.br.
authors.forename: Edvaldo A A
authors.initials: EA
authors.lastname: da Silva
mesh_terms: D000383:Agriculture; D001947:Breeding; D002734:Chlorophyll / Q000378:metabolism; D004777:Environment; D020869:Gene Expression Profiling; D017343:Genes, Plant; D010935:Plant Diseases / Q000235:genetics; D012639:Seeds / Q000378:metabolism; D013025:Glycine max / Q000235:genetics* / Q000502:physiology; D013312:Stress, Physiological
chemical_list: D002734:Chlorophyll
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