NADPH:protochlorophyllide oxidoreductase (POR) catalyzes the light-dependent reduction of protochlorophyllide. To elucidate the physiological function of three differentially regulated POR isoforms (PORA, PORB and PORC) in Arabidopsis thaliana, we isolated T-DNA tagged null mutants of porB and porC. The mature seedlings of the mutants had normal photosynthetic competencies, showing that PORB an...

In a companion paper (BovC et al., 1980) we explained why the prokaryote associated with citrus greening disease is not a mycoplasma, and showed that greening-affected citrus seedlings, which had absorbed penicillin through their roots, developed an abundant root system and produced new, vigorous, symptomless shoots. On the basis of these results, as well as previous ultrastructural studies (Ga...

Abstract—It is an indispensible strategy to adopt greenery approach on architectural bases so as to improve ecological habitats, decrease heat-island effect, purify air quality, and relieve surface runoff as well as noise pollution, all of which are done in an attempt to achieve sustainable environment. How we can do with plant design to attain the best visual quality and ideal carbon dioxide f...

A series of measurements showed that community greening and trees shading had different degree of cooling effect. The cooling effect of wall greening was related to factors such as heat storage capacity and the orientation of the wall, climatic conditions. As compared to the heat reduced by sheltering the solar radiation, the heat absorbed by plant transpiration had greater cooling contribution...

The functional transition of glyoxysomes to leaf peroxisomes occurs during greening of germinating pumpkin cotyledons (Cucurbita sp. Amakuri Nankin). The immunocytochemical protein A-gold method was employed in the analysis of the transition using glyoxysomal specific citrate synthase immunoglobulin G and leaf peroxisomal specific glycolate oxidase immunoglobulin G. The labeling density of citr...

Biosynthesis of photosystem I chlorophyll-protein complex, derived from chloroplast lamellae solubilized with Triton X-100, was examined in rapidly greening primary leaves of the jack bean. It was found that the chlorophyll/P700 ratio of the complex was low (35/1) in the early stages of greening, and increased steadily to a stable level (75/1) during continued chloroplast development. It is sug...

[1] The sensitivity of Amazon rainforests to dry‐season droughts is still poorly understood, with reports of enhanced tree mortality and forest fires on one hand, and excessive forest greening on the other. Here, we report that the previous results of large‐scale greening of the Amazon, obtained from an earlier version of satellite‐ derived vegetation greenness data ‐ Collection 4 (C4) Enhanced...

Plants fine-tune light responses through interactions between photoreceptors. We have previously reported that the greening of Arabidopsis thaliana roots is regulated synergistically by phytochromes and cryptochromes. In the present study, we investigated the functions of the N- and C-terminal domains of phytochrome B (phyB) in the interactions between phyB and cryptochrome signaling cascades. ...

Recently the role of nitrogen monoxide (NO) in iron homeostasis has been proved by means of exogenously-applied different NO donors that can provoke leaf re-greening under conditions of iron deficiency. It was also supposed, that Fe-deficiency itself could stimulate the endogenous production of NO in stressed plants (Graziano and Lamattina, 2007). In this study, the comparison between effects o...

Citrus greening is a serious disease affecting citrus production in Florida and different parts of the world. This disease is spread by an insect vector and the trees are killed several years after infection. There is no known treatment for the disease. Disease detection and removal of infected trees is a critical part of citrus greening disease management efforts. This paper reports the evalua...