title: Paclobutrazol treatment as a potential strategy for higher seed and oil yield in field-grown Camelina sativa L. Crantz.
abstract: BACKGROUND
  Camelina (Camelina sativa L. Crantz) is a non-food oilseed crop which holds promise as an alternative biofuel energy resource. Its ability to grow in a variety of climatic and soil conditions and minimal requirements of agronomical inputs than other oilseed crops makes it economically viable for advanced biofuel production. We designed a study to investigate the effect of paclobutrazol [2RS, 3RS)-1-(4-Chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol] (PBZ), a popular plant growth regulator, on the seed and oil yield of Camelina sativa (cv. Celine).
  
  
  RESULTS
  A field-based micro-trial setup was established in a randomized block design and the study was performed twice within a span of five months (October 2010 to February 2011) and five different PBZ treatments (Control: T0; 25 mg l-1: T1; 50 mg l-1: T2; 75 mg l-1: T3; 100 mg l-1: T4; 125 mg l-1: T5) were applied (soil application) at the time of initiation of flowering. PBZ at 100 mg l-1 concentration (T4) resulted in highest seed and oil yield by 80% and 15%, respectively. The seed yield increment was mainly due to enhanced number of siliques per plant when compared to control. The PBZ - treated plants displayed better photosynthetic leaf gas exchange characteristics, higher chlorophyll contents and possessed dark green leaves which were photosynthetically active for a longer period and facilitated higher photoassimilation.
  
  
  CONCLUSIONS
  We report for the first time that application of optimized PBZ dose can be a potential strategy to achieve higher seed and oil yield from Camelina sativa that holds great promise as a biofuel crop in future.
authors.affiliation: Department of Plant Sciences, University of Hyderabad, Hyderabad, India.
authors.forename: Sumit
authors.initials: S
authors.lastname: Kumar
authors.forename: Sreenivas
authors.initials: S
authors.lastname: Ghatty
authors.forename: Jella
authors.initials: J
authors.lastname: Satyanarayana
authors.forename: Anirban
authors.initials: A
authors.lastname: Guha
authors.forename: Bsk
authors.initials: B
authors.lastname: Chaitanya
authors.forename: Attipalli R
authors.initials: AR
authors.lastname: Reddy
mesh_terms: D056804:Biofuels; D019607:Brassicaceae / Q000033:anatomy & histology / Q000187:drug effects* / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D010788:Photosynthesis; D010937:Plant Growth Regulators / Q000494:pharmacology*; D018515:Plant Leaves / Q000033:anatomy & histology / Q000187:drug effects* / Q000378:metabolism; D010938:Plant Oils / Q000737:chemistry / Q000378:metabolism*; D012621:Seasons; D012639:Seeds / Q000737:chemistry*; D012987:Soil; D014230:Triazoles / Q000494:pharmacology*
chemical_list: D056804:Biofuels; D010937:Plant Growth Regulators; D010938:Plant Oils; D012987:Soil; D014230:Triazoles; D002734:Chlorophyll; C053370:paclobutrazol