浸漬接種剤としての浸透圧耐性を持つヘテロ発酵乳酸菌のスクリーニング
Siriwan D Martens1, Wolfgang Wagner2, Mariana Schneider3
1Saxon State Office for Environment, Agriculture and Geology (LfULG), 04886 Köllitsch, Germany.
Microorganisms
|January 28, 2026
まとめ
ヘテロ発酵乳酸菌(LABhe)はサイレージの好気的安定性を向上させる。in vitro試験は高乾物サイレージ用のLABhe浸透圧耐性を評価できるが、定量的には株をランク付けできない。
科学分野:
- 農業科学
- 微生物学
- 食品科学
背景:
- サイレージは好気的劣化を起こしやすく、特に高乾物(DM)のものはその傾向が強い。
- 乳酸菌(LAB)はサイレージの発酵と安定性に不可欠である。
- ヘテロ発酵乳酸菌(LABhe)はサイレージの好気的安定性を高める可能性を示す。
研究 の 目的:
- 高DMサイレージに見られる高浸透圧条件下での高浸透圧耐性を持つLABhe株を選択するためのin vitro法の評価。
- LABheとホモ発酵乳酸菌(LABho)の浸透圧耐性をin vitroおよびin situで比較する。
主な方法:
- 高糖質培地を用いたin vitro試験を実施した。
- 細菌の発酵活性を時間(0〜48時間)経過に伴うpH変化の測定によって評価した。
- 結果は、高DM草サイレージを用いたin situ試験で検証した。
主要な成果:
- LABheはLABhoと比較して、高DMおよび高浸透圧に対する感受性が有意に低かった。
- in vitro試験はLABheの浸透圧耐性の定性的評価を提供した。
- この方法では、浸透圧耐性に基づくLABhe株の定量的ランク付けは達成できなかった。
結論:
- in vitro試験は、LABheの浸透圧耐性の定性的評価に適している。
- この方法は、高DMサイレージの好気的安定性の向上に寄与する可能性のあるLABheの選択に役立つ。
- 浸透圧耐性に関する定量的株分類には、さらなる方法が必要である。
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