Temperature-induced changes of variable fluorescence-yield in intact leaves [Spinacia oleracea]

anatomia anatomie anatomy centrospermae chemicophysical properties chenopodiaceae chlorophylle chlorophylls clorofilas crops cultivos dicotiledoneas dicotyledons economic plants feuille freezing green vegetables hojas hortalizas (plantas) hortalizas verdes leaves optical properties pigment pigmentos pigments plant anatomy plantas plante plante de culture plants procesamiento processing spinacia oleracea temperatura temperature thawing traitement vegetable crops