Photosynthetic base of reduced grain yield by shading stress during the early reproductive stage of two wheat cultivars.

The young microspore (YM) stage is the most sensitive period for wheat grain formation to abiotic stress. Shading stress during YM stage reduces grain yield mainly due to grain number decrease. However, the photosynthetic base for grain number decrease is still unclear.

Complementary analyses of the transcriptome and iTRAQ proteome revealed mechanism of ethylene dependent salt response in bread wheat (Triticum aestivum L.).

In order to clarify the ethylene dependent salt response mechanism in wheat, 2-week-old wheat seedlings of cultivar 'Qingmai 6' treated with water, sodium chloride (NaCl), NaCl and ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC), and NaCl and ethylene signaling inhibitor 1-methylcyclopropene (1-MCP) were collected and analyzed by transcriptional sequencing and isobaric tags for relative and absolute quantitation (iTRAQ) proteomics. At least 1140 proteins and 73,401 genes were identified, and proteins including ribosomal proteins (RPs), nucleoside diphosphate kinases (CDPKs), transaldolases (TALs), beta-glucosidases (BGLUs), phosphoenlpyruvate carboxylases (PEPCs), superoxide dismutases (SODs), and 6-phosphogluconate dehydrogenases (6-PGDHs) were significantly differently expressed. These genes and proteins revealed that ethylene dependent salt response through RPs activation, chaperones synthesis, the reactive oxygen species (ROS) scavenging, and carbohydrate metabolites pathway.

[Effects of drought stress, high temperature and elevated CO2 concentration on the growth of winter wheat].

The impacts of climate change on the grain yield, photosynthesis, and water conditions of winter wheat were assessed based on an experiment, in which wheat plants were subjected to ambient and elevated CO2 concentrations, ambient and elevated temperatures, and low and high water conditions independently and in combination. The CO2 enrichment alone had no effect on the photosynthesis of winter wheat, whereas higher temperature and drought significantly decreased the photosynthetic rate. Water conditions in flag leaves were not significantly changed at the elevated CO2 concentration or elevated temperature.

Comparison of the effects of symmetric and asymmetric temperature elevation and CO2 enrichment on yield and evapotranspiration of winter wheat (Triticum aestivum L.).

Under the changing climate, asymmetric warming pattern would be more likely during day and night time, instead of symmetric one. Concurrently, the growth responses and water use of plants may be different compared with those estimated based on symmetric warming. In this work, it was compared with the effects of symmetric (ETs) and asymmetric (ETa) elevation of temperature alone, and in interaction with elevated carbon dioxide concentration (EC), on the grain yield (GY) and evapotranspiration in winter wheat (Triticum aestivum L.

Stable dynamic detection scheme for magnetostrictive fiber-optic interferometric sensors.

A stable dynamic detection scheme for magnetostrictive fiber-optic interferometric sensors is studied. The working principle is presented and the experimental verification is performed. The results show that the system employing the dynamic detection scheme has better stability and sensitivity in comparison with the system employing quadrature control technique.

A novel algorithm for a multi-cavity Raman fiber laser.

In this paper a Raman Fiber Lasers (RFLs) with several embedded cavities are studied. A novel algorithm is proposed to solve the coupled equations describing the optical power evolution in a RFL. By using some invariant constants as the boundary condition at the output end, the problem of solving ordinary differential equations (ODEs) with guessing boundary value is translated into a two-boundary-condition ODE problem.