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<p>The mycorrhization of <i>Quercus suber</i> (cork oak) with four species of black truffles <i>(Tuber melanosporum</i>,<i> T. uncinatum</i>,<i> T. excavatum</i>, and <i>T. oligospermum</i>) was studied to evaluate their effect on morphological traits, chlorophyll production, as well as protein and soluble sugar accumulation. Prior acorns’ cold-stratification improved their germination 42-fold. Their harvest period also impacted germination, as acorns harvested at the beginning of October germinated better (2–8 folds) than those harvested earlier. In addition, the use of acidic soil enhanced 2-folds germination due to <i>Q. suber’</i>s affinity to such conditions. Plants mycorrhized with <i>T. oligospermum</i> presented the highest size (223%), larger leaves (213%), and accumulated more biomass in aerial and root parts (805 and 436%, respectively). Mycorrhization increased chlorophyll (more than 100%, especially with <i>T. uncinatum</i> and <i>T. oligospermum)</i> and sugar content in the aerial part (368–473%) independently of the fungal species. The concentration of proteins also increased in the aerial part of all mycorrhized plants, and especially those mycorrhized with <i>T. excavatum</i> (about 300%). Mycorrhization didn´t affect roots’ sugar or protein content, except for <i>T. melanosporum</i> and <i>T. excavatum</i>, which increased by 55% and 28%, respectively, in protein concentration. This study represents a pioneering attempt to mycorrhize <i>Q. suber</i> with <i>Tuber</i> species. These results highlighted the potential of <i>T. oligospermum</i> as a symbiotic partner to improve <i>Q. suber</i> productivity.</p>

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Inoculation of Quercus suber with Tuber spp: morphological and physiological changes

  • 期刊论文

  • 发表日期：

    2026年1月1日

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  • Chaimae Meyad,
  • Marwa Oikrim,
  • Imane Wahby,
  • Lahsen Khabar,
  • Laila Rhazi

摘要

The mycorrhization of Quercus suber (cork oak) with four species of black truffles (Tuber melanosporum, T. uncinatum, T. excavatum, and T. oligospermum) was studied to evaluate their effect on morphological traits, chlorophyll production, as well as protein and soluble sugar accumulation. Prior acorns’ cold-stratification improved their germination 42-fold. Their harvest period also impacted germination, as acorns harvested at the beginning of October germinated better (2–8 folds) than those harvested earlier. In addition, the use of acidic soil enhanced 2-folds germination due to Q. suber’s affinity to such conditions. Plants mycorrhized with T. oligospermum presented the highest size (223%), larger leaves (213%), and accumulated more biomass in aerial and root parts (805 and 436%, respectively). Mycorrhization increased chlorophyll (more than 100%, especially with T. uncinatum and T. oligospermum) and sugar content in the aerial part (368–473%) independently of the fungal species. The concentration of proteins also increased in the aerial part of all mycorrhized plants, and especially those mycorrhized with T. excavatum (about 300%). Mycorrhization didn´t affect roots’ sugar or protein content, except for T. melanosporum and T. excavatum, which increased by 55% and 28%, respectively, in protein concentration. This study represents a pioneering attempt to mycorrhize Q. suber with Tuber species. These results highlighted the potential of T. oligospermum as a symbiotic partner to improve Q. suber productivity.