INITIAL DEVELOPMENT OF AÇAÍ PLANTS UNDER SHADE GRADATION

Photosynthetic units of sun and shade plants.

A computer analysis of fluorescence induction curves of leaves treated with 3-(3,4-dichlorophenyl)-1,1 dimethylurea was done for several species. These measurements gave the ratios of the total chlorophyll to photosystem II reaction centers. This communication is a preliminary survey of sun and shade plants and demonstrates a significant variation in this ratio. In the sun plants, the photosynt...

Photomorphogenesis: Plants Feel Blue in the Shade

Plants integrate multiple environmental signals to detect and avoid shading from neighbouring vegetation. Two new studies highlight the importance of blue light in the regulation of stem elongation and bending during shade escape.

Growth and development of sunflower fruits under shade during pre and early post-anthesis period

The effect of pre and post-anthesis shading (20% of incident radiation) on pericarp development, cotyledon cell number and seed growth dynamic of fruits from three positions in the capitulum (peripheral, mid and central) of two sunflower (Helianthus annuus L.) genotypes were studied at two locations. Both shading treatments reduced pericarp weight, fruit volume and total yield per plant. Plants...

Degree Gradation of Verbs

BOTANICAL BRIEFING Phytochromes and Shade-avoidance Responses in Plants

Background and Aims The ability to detect and respond to the impending threat of shade can confer significant selective advantage to plants growing in natural communities. This Botanical Briefing highlights (a) the regulation of shade-avoidance responses by endogenous and exogenous factors and (b) current understanding of the molecular components involved in red to far-red ratio signal transduc...