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<p>Graminoids are cosmopolitan in distribution and mainly belong to three monocotyledonous families: Poaceae, Cyperaceae, and Juncaceae. The species exhibit a wide range of germination strategies due to its diverse seed traits, phylogeny, and responses to environmental cues. The present study investigates seed germination behaviour and trait variation among 19 graminoids from the subtropical monsoon regions of Jiujiang, China. The study aimed to (i) assess the role of seed morphological traits, particularly seed mass and shape, in affecting germination in graminoid; (ii) evaluate the effects of light and temperature on seed germination behaviour among graminoid; (iii) analyse the ecological and bioclimatic significance of germination strategies in graminoid. Seeds were collected at maturity, and seed traits (size, shape, mass, water imbibition, etc.) were quantified using stereo-microscopy and gravimetric methods. Germination tests were conducted in five temperature regimes (5/10°C, 10/20°C, 20/30°C, 25/35°C, and 35/40°C) and two light conditions: either 24-h darkness (dark treatment) or 12&#xa0;h light/12&#xa0;h darkness (light treatment). The findings of the study revealed significant interspecific and interfamilial variation in the seed traits and germination responses. Most species exhibited light-stimulated photoblastic response. Species showed a distinct response to temperature. Some species showed decreased germination at 5&#xa0;°C lower temperature, while other exhibited increased germination at lower temperatures. The mean germination time (MGT) varied between species, ranging from 1.2 days to 28.3 days at 5/10°C. The germination synchrony also varied significantly due to the high variation in germination time. These findings have practical implications for designing the restoration intervention in the grassland ecosystems.</p>

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Germination behaviour and traits variability among nineteen graminoids of subtropical region of China

  • 期刊论文

  • 发表日期：

    2026年4月22日

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  • Arvind Bhatt,
  • Harsh Kumar Chauhan,
  • Cristina Blandino,
  • Marcelo F. Pompelli,
  • Luis E. Oviedo Zumaque,
  • Richard Onalbi Hoyos-Lopez

摘要

Graminoids are cosmopolitan in distribution and mainly belong to three monocotyledonous families: Poaceae, Cyperaceae, and Juncaceae. The species exhibit a wide range of germination strategies due to its diverse seed traits, phylogeny, and responses to environmental cues. The present study investigates seed germination behaviour and trait variation among 19 graminoids from the subtropical monsoon regions of Jiujiang, China. The study aimed to (i) assess the role of seed morphological traits, particularly seed mass and shape, in affecting germination in graminoid; (ii) evaluate the effects of light and temperature on seed germination behaviour among graminoid; (iii) analyse the ecological and bioclimatic significance of germination strategies in graminoid. Seeds were collected at maturity, and seed traits (size, shape, mass, water imbibition, etc.) were quantified using stereo-microscopy and gravimetric methods. Germination tests were conducted in five temperature regimes (5/10°C, 10/20°C, 20/30°C, 25/35°C, and 35/40°C) and two light conditions: either 24-h darkness (dark treatment) or 12 h light/12 h darkness (light treatment). The findings of the study revealed significant interspecific and interfamilial variation in the seed traits and germination responses. Most species exhibited light-stimulated photoblastic response. Species showed a distinct response to temperature. Some species showed decreased germination at 5 °C lower temperature, while other exhibited increased germination at lower temperatures. The mean germination time (MGT) varied between species, ranging from 1.2 days to 28.3 days at 5/10°C. The germination synchrony also varied significantly due to the high variation in germination time. These findings have practical implications for designing the restoration intervention in the grassland ecosystems.