Diffusional limitations to photosynthesis, relative water content (RWC), pigment concentrations and their association with reflectance indices were studied in olive (Olea europaea) saplings subjected to water-stress and re-watering. RWC decreased sharply as drought progressed. Following rewatering, RWC gradually increased to pre-stress values. Photosynthesis (A), stomatal conductance (gs), meso...

MicroRNAs (miRNA) are small RNAs that posttranscriptionally regulate gene expression, predominantly by modulating the translation and stability of target messenger RNAs [1]. Over the last 15 years, a tremendous expansion of knowledge has changed the perception of miRNAs from a rare peculiarity in nematode worms to a ubiquitous layer of gene expression regulation, with broad roles in development...

In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: Review The photochemical reflectance index (PRI) and the remote sensing of leaf, canopy and ecosystem radiation use efficien...

A robust lter for the estimation of the pulse repetition interval (PRI) of a periodic radar pulse train is derived. The lter uses only the pulse times of arrival (TOA) and is speciically designed, using mixture distribution techniques developed for the robustiication of the Kalman lter to outliers, to be robust to both missing pulses and to a small number of spurious noise pulses. In fact, the ...

A substantial proportion of eukaryotic transcripts are considered to be noncoding RNAs because they contain only short open reading frames (sORFs). Recent findings suggest, however, that some sORFs encode small bioactive peptides. Here, we show that peptides of 11 to 32 amino acids encoded by the polished rice (pri) sORF gene control epidermal differentiation in Drosophila by modifying the tran...

A linear relationship (r2=0.79, p<0.001) between the photochemical re ectance index (PRI) and photosynthetic light use eYciency (LUE) was found for eight plant species that exhibit a signiŽ cant range in foliage physical properties and nitrogen content. Experiments were conducted under artiŽ cial sunlight in a climate laboratory, using narrow-band (3.2 nm) canopy-level re ectance data to calc...

Plant disease and pests influence the physiological state and restricts the healthy growth of crops. Physiological measurements are considered the most accurate way of assessing plant health status. In this paper, we researched the use of an in situ hyperspectral remote sensor to detect plant water status in winter wheat infected with powdery mildew. Using a diseased nursery field and artificia...

trans-Acting small interfering RNAs (tasiRNAs) participate in the regulation of organ morphogenesis and determination of developmental timing in plants by down-regulating target genes through mRNA cleavage. The production of tasiRNAs is triggered by microRNA173 (miR173) and other specific microRNA-mediated cleavage of 5'-capped and 3'-polyadenylated primary TAS transcripts (pri-TASs). Although ...

Arabidopsis thaliana HYL1 is a nuclear double-stranded RNA-binding protein involved in the maturation of pri-miRNAs. A quantitative real-time PCR platform for parallel quantification of 176 pri-miRNAs was used to reveal strong accumulation of 57 miRNA precursors in the hyl1 mutant that completely lacks HYL1 protein. This approach enabled us for the first time to pinpoint particular members of M...

Severe droughts strongly impact photosynthesis (GPP), and satellite imagery has yet to demonstrate its ability to detect drought effects. Especially changes in vegetation functioning when vegetation state remains unaltered (no browning or defoliation) pose a challenge to satellite-derived indicators. We evaluated the performance of different satellite indicators to detect strong drought effects...