The interiors of plants are colonized by diverse microorganisms that are referred to as endophytes. Endophytes have received much attention over the past few decades, yet many questions remain unanswered regarding patterns in their biodiversity at local to global scales. To characterize research effort to date, we synthesized results from ~600 published studies. Our survey revealed a global research interest and highlighted several gaps in knowledge. For instance, of the 17 biomes encompassed by our survey, 7 were understudied and together composed only 7% of the studies that we considered. We found that fungal endophyte diversity has been characterized in at least one host from 30% of embryophyte families, while bacterial endophytes have been surveyed in hosts from only 10.5% of families. We complimented our survey with a vote counting procedure to determine endophyte richness patterns among plant tissue types. We found that variation in endophyte assemblages in above‐ground tissues varied with host growth habit. Stems were the richest tissue in woody plants, whereas roots were the richest tissue in graminoids. For forbs, we found no consistent differences in relative tissue richness among studies. We propose future directions to fill the gaps in knowledge we uncovered and inspire further research.

中文翻译：

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内生菌在生物群落，植物系统发育和宿主组织中的多样性和分布：我们走了多远，我们从那里走到哪里？

植物内部被称为内生菌的多种微生物所定殖。在过去的几十年中，内生菌受到了广泛的关注，但是关于本地到全球范围内其生物多样性模式的许多问题仍未得到解答。为了表征迄今为止的研究成果，我们综合了约600篇已发表研究的结果。我们的调查揭示了全球研究兴趣，并强调了知识方面的一些空白。例如，在我们调查涵盖的17个生物群落中，有7个生物群落的研究不足，仅占我们考虑的研究的7％。我们发现真菌内生菌多样性已在至少30％的胚胎植物家族的寄主中表征，而细菌内生菌已在仅10.5％家庭的寄主中进行了调查。我们用投票计数程序来补充我们的调查，以确定植物组织类型之间的内生菌富集模式。我们发现，地上植物内生菌组合的变化随宿主的生长习性而变化。茎是木本植物中最丰富的组织，而根是类葛粉中最丰富的组织。对于前叉，我们发现研究之间相对组织丰富度没有一致的差异。我们提出了未来的方向，以填补我们发现的知识空白，并激发进一步的研究。我们发现研究之间相对组织丰富度没有一致的差异。我们提出了未来的方向，以填补我们发现的知识空白，并激发进一步的研究。我们发现研究之间相对组织丰富度没有一致的差异。我们提出了未来的方向，以填补我们发现的知识空白，并激发进一步的研究。