Yoshinobu Kawamitsu

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Betaine is an important osmoprotectant in many plants, but its transport activity has only been demonstrated using a proline transporter from tomato, a betaine-nonaccumulating plant. In this study, two full-length and one partial transporter genes were isolated from betaine-accumulating mangrove Avicennia marina. Their homologies to betaine transporters(More)
Glycinebetaine is an important osmoprotectant in bacteria, plants, and animals, but only little information is available on the synthesis of glycinebetaine in tree plants. Among four mangrove species, glycinebetaine could be detected only in Avicennia marina. Pinitol was the main osmoprotectant in the other three species. The level of glycinebetaine in A.(More)
The tropical plant Ficus microcarpa L. f. cv. Golden Leaves (GL) is a high-light sensitive tropical fig tree in which sun-leaves are yellow and shade-leaves are green. We compared the response of photosynthetic activities to strong light between GL and its wild-type (WT, Ficus microcarpa L. f.). Field measurements of maximum photosystem II (PSII) efficiency(More)
Analyzing the assimilation rate (A) relative to the CO(2) concentration inside leaves (C(i)) has been a useful approach for investigating plant responses to various environments. Nevertheless, there are uncertainties in calculating C(i) when stomata close, restricting the application. Here, A-C(i) curves were traced in sunflower (Helianthus annuus L.)(More)
Development of techniques utilizing waste without any additional energy or rare catalysts is a starting point for becoming sustainable. In the present work, the complex utilization of greenhouse residues was studied on a commercial scale. Only the energy produced by the process (8%) was used to run the technology, thanks to multilevel heat recuperation and(More)
Sugarcane is generally fertilized with potassium chloride (KCl). It was reported in Okinawa, Japan, that potassium (K) in sugarcane juice has a negative effect on juice sucrose concentration. However, in some experiments, increasing K levels with potassium sulfate (K2SO4) did not reduce sucrose concentration. We hypothesized that sugarcane quality is(More)
A system for measurement of leaf gas exchange while regulating leaf to air vapour pressure difference has been developed; it comprises an assimilation chamber, leaf temperature controller, mass flow controller, dew point controller and personal computer. A relative humidity sensor and air and leaf temperature sensors, which are all used for regulating the(More)
Photosynthesis and transpiration were simultaneously measured under different light intensity, temperature and humidity conditions inSasa nipponica andArundinaria pygmaea grown in exposed and shaded habitats. Both species showed a saturated light curve for photosynthetic rate. The saturation point was lower in shaded plants. The apparent quantum yields were(More)
Appropriate fertilizer management practices are important to improve sugarcane quality. We have ever reported that KCl and K2SO4 had different effects on sugarcane quality and that only excessive KCl application decreased sucrose concentration in juice, indicating that Cl− is the key factor for the quality improvement. In this study, to see the individual(More)
Underwater high-voltage discharges (3.5 kV) resulting in 4.9 kJ shock waves (50-60 MPa) were studied at the laboratory scale as a Jatropha curcas L. seed disintegration method. Grinding and macerating in an excess of methanol (3.5:1) was advantageous because methanol acts both as a liquid carrier for the pressure shock waves and as a solvent that increases(More)
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