@article{fdi:010044169,
  title = {{L}uz e {KNO}3 na germina{\c{c}}ão de sementes de {T}ridax procumbens sob temperatura constante e alternada = {L}ight and {KNO}3 on {T}ridax procumbens seed germination at constant and alternating temperatures},
  author = {{I}keda, {F}. {S}. and {C}armona, {R}. and {M}itja, {D}anielle and {G}uimaraes, {R}. {M}.},
  editor = {},
  language = {{POR}; {ENG}},
  abstract = {{T}here are few studies available on germination of tropical weed species, {T}ridax procumbens included, despite its importance as a crop weed. {T}his study was carried out at the {L}aboratory of {P}lant {B}iophysics of {E}mbrapa {C}errados, {P}lanaltina, {D}k, to evaluate the effect of light and {KNO}3 on {T}. procumbens seed germination at constant and alternating temperatures. {F}our sub-samples of 75 seeds were submitted to a factorial combination of light (darkness: 12 daily hours of light photoperiod) and substrate moistened with {KNO}3 solution (0% of {KNO}3; 0.2% of {KNO}3)for the assays at 25 degrees {C} constant and 15 degrees {C}/35 degrees {C} alternating temperatures, arranged in a completely randomized experimental design. {S}eed germination was daily counted based on emission of primary roots, with accumulated germination percentage, germination speed and accumulated germination curve being evaluated. {L}ight contributed to increase germination percentage and speed at constant temperature, while at alternating temperatures, increase of germination percentage and speed occurred with {KNO}3 application. regardless of the presence or absence of tight. {T}he accumulated germination curves at 25 degrees {C} and 15 degrees {C}/35 degrees {C} were adjusted to the logistic model, showing seed germination asynchrony along time.},
  keywords = {accumulated germination curve ; dormancy ; tridax daisy ; germination speed},
  booktitle = {},
  journal = {{P}lanta {D}aninha},
  volume = {26},
  numero = {4},
  pages = {751--756},
  ISSN = {0100-8358},
  year = {2008},
  DOI = {10.1590/{S}0100-83582008000400006},
  URL = {https://www.documentation.ird.fr/hor/fdi:010044169},
}