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ペマフィブラート ワ シシツイジョウショウ オ トモナウ ヒアルコールセイ シボウセイカン シッカン カンジャ ノ カンキノウ ケンサ ト センイカ マーカー ノ アタイ オ ゲキテキ ニ カイゼン スル
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シンガタ コロナ ウイルス ノ デルタ カブ ト オミクロン カブ ニヨル ＴＭＰＲＳＳ２ リヨウノウ ノ サ : ショウニ カンジャ ノ ゾウカ トノ カンレン
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ビマンセイ ダイサイボウガタ Bサイボウ リンパシュ ニオケル MYC ハツゲン ト カヨウセイ インターロイキン-2 ジュヨウタイ オ モチイタ ヨゴヨソク ノ カイハツ
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ヘンケイセイ カンセツショウ オ トモナウ ヨウツイ ツイカン カンセツ ノ カンセツホウ ニ ハツゲン スル microRNA ノ モウラテキ カイセキ ： タンイツ コタイ カラ サイシュ シタ ケンタイ ニヨル ショキヘンケイセイ カンセツショウ ト コウキ ヘンケイセイ カンセツショウ ノ ヒカク
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Detecting the changes of wood properties with respect to elapsed years since wood formation by the eigenvalue distribution of near infrared spectral matrices
Get PDFThe effects of aging on wood properties are usually evaluated based on cambial age, with the assumption that the properties do not change once the wood has formed. This study examined changes in wood properties with the number of years elapsed since wood formation. Near-infrared (NIR) spectra were acquired from various positions of 20 sample trees, and changes in the spectra were examined with respect to elapsed years. We considered changes in multiple traits inclusively, rather than individually, using the distribution of eigenvalues calculated from NIR spectral matrices. The diffusion of eigenvalues with an increase in elapsed years followed Dyson’s Brownian motion. The gradual increase in the first eigenvalue, which is equivalent to the Helmholtz-free energy, indicates that the xylem in the heartwood changes to a more ordered physical state over time. The variations in Shannon entropy and density matrix with elapsed years revealed the irreversibility of the aging process. The proposed method is independent of a specific coordinate system and can, therefore, be applied using a wide variety of information other than that obtained from NIR spectra
ｉｎ ｖｉｔｒｏ シンキン ブンカ ニ オイテ ＳＨＯＸ２ ワ ヒト ドウボウ ケッセツ サイボウ シュウダン ノ ジュンカ オ カノウ ニ スル
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Potential of Myrobalan Plum as a New Pollinizer for Japanese Plum Cultivars
Get PDFThe aim of this study was to select new pollinizers for Prunus spp. with high pollen germination rates at low temperatures and assess their effect on the fruit set of Japanese plum cultivars. In this study, we examined in vitro pollen germination in 17 plum cultivars and two Myrobalan plum lines (420-2-2 and 421-3-1) at eight temperatures (7.5°C, 10.0°C, 12.5°C, 15.0°C, 17.5°C, 20.5°C, 22.5°C, and 25.0°C). The extent of pollen germination was affected by the incubation temperature. The germination rates of most cultivars were highest between 20.0°C to 25.0°C and ≤ 20% between 7.5°C to 10.0°C. However, the two Myrobalan plum lines (420-2-2 and 421-3-1) showed higher germination rates than the other cultivars at 10.0°C with ≥ 25% germination. The high germination rate in Myrobalan 420-2-2 was further confirmed in experiments conducted by our group in 2020. Open field studies on the Japanese plum ‘Kiyo’ revealed that the fruit setting rate was 17.6% using Myrobalan 420-2-2 and only 9.9% in the control using ‘Hollywood’. The fruit setting rate of the Japanese plum ‘Taiyo’ was approximately 20% when pollinated with both the cultivars. However, both fruit setting rate and fruit quality did not differ significantly between ‘Kiyo’ and ‘Taiyo’ with either pollination treatment. The formation rates of perfect seeds in ‘Taiyo’ were 90% and 65% by pollination using Myrobalan 420-2-2 and ‘Hollywood’, respectively. However, pollination treatment using pollen from both cultivars did not show any variations in the early development of the ovary and ovule. S-genotyping in Myrobalan 420-2-2 was determined as S7S10; therefore, we assumed that Myrobalan could be cross-compatible with many other plum cultivars. In conclusion, we selected Myrobalan 420-2-2 as a new plum pollinizer as it can effectively pollinate Japanese plum and germinate at low temperatures with no adverse effect on fruit set and quality