Germination Responses of Several Poaceae Members towards Differential Storage Durations

Abstract

Concerns over biodiversity loss and increasing biological invasion have forced interest on assessment of the effects on native plant species diversity in grassland community. To observe different patterns of grass emergence (dormancy/germination) in the warm tropical grasslands of India, time span of a seed from the seedling stage to a mature plant becomes very crucial for the community development. In the present study seed germination response of six dominant species of the selected study area were tested to record the various effects of dry storage conditions on seed germinability. The species selected were Apluda mutica L., Cenchrus ciliaris L., Chrysopogon fulvus (Spreng.) Chiov., Dichanthium annulatum (Forsk.) Stapf., Heteropogon contortus (L.) P. Beauv. ex Roem. and Schult. and Themeda triandra (R. Br.) Stapf. For this purpose, seed collection at mature seed stage, seed processing and dry seed storage were followed by the germination test system. Obtained results are exhibited in the form of different responses such as, species response patterns towards capacity for immediate germination, responses to dormancy, dry storage and temperature fluctuation. The extent of the requirement in breakage of primary dormancy was highly correlated with the timing of seed maturity, precursors of seed dormancy and seed viability. In present screening out of the six studied species Apluda mutica, Cenchrus ciliaris and Dichanthium annulatum showed dependable germination pattern to fluctuating temperature. The correlation between viability and germination suggests that the germination of Apluda mutica, Cenchrus ciliaris and Themeda triandra are linearly dependent on the viability that the seeds of these species have. As these species showed less influence with the relative fluctuating environment, they can be stored for longer period and frequently can be use for community regeneration in pasture development.

Novel plant uses and their conservation status in a semiarid subtropical region of Pakistan

“…However, variable weather patterns may lead to different dry, warm, and moist conditions, which provide favorable conditions for Poaceae species, e.g., C. ciliaris, C. citratus, C. citratus, C. dactylon, E. repens and C. setosus subsp. setosus (Panchal et al 2011). The high number of medicinal plant species in the Fabaceae indicates that the family contains many bioactive compounds, especially because it represents the largest group of angiosperms (Sarwar 2013;Fatima et al 2018;Bokov et al 2020;Jančić et al 2022).…”

Patrones de germinación en gramíneas presentes en el Desierto Chihuahuense

“…Con base en las variables evaluadas de germinación estándar, velocidad, tiempo y rango de germinación, no se observó algún patrón diferente de germinación entre especies nativas y exóticas. La variación en germinación es debida a múltiples factores, desde condiciones donde se produjo la semilla hasta el manejo de ésta una vez cosechada (Boeken et al 2004, Panchal et al 2011. La germinación reportada para algunas de las especies aquí evaluadas es similar a otros trabajos.…”

“…En el caso específico de gramíneas, a nivel nacional se han reportado 1,416 taxones (Sánchez-Ken 2019) y en el estado de Chihuahua 421 (Herrera & Peterson 2018). Un primer paso es tener el conocimiento sobre la biología de la semilla de plantas potenciales para la restauración e información básica para incrementar sus probabilidades de éxito (Panchal et al 2011, Aires et al 2013, Mummey et al 2016, Kildisheva et al 2018. Además, esta información puede apoyar al entendimiento de comportamientos invasivos de algunas especies de plantas (Wilsey & Polley 2006, Xu et al 2019.…”

“…La germinación de semillas y el establecimiento de plántulas son etapas críticas en las plantas, especialmente en ambientes áridos (Bewley et al 2013, Baskin & Baskin 2014. Entre otros factores, el porcentaje de germinación de las semillas depende de: la etapa fenológica de la planta al momento de colecta, las condiciones ambientales locales y tiempo de cosecha, así como las condiciones de almacenamiento (Panchal et al 2011;Bewley et al 2013). Por otra parte, características como la velocidad y la uniformidad de la germinación y un rápido desarrollo de las plántulas están relacionadas con características adaptativas de las poblaciones (Bewley et al 2013;Baskin & Baskin 2014, Mummey et al 2016, Duchini et al 2018.…”

Overcoming germination constraints in seven grass species for seed‐based restoration in the Australian monsoonal tropics

“…Data are already available in the literature for widespread species like Heteropogon contortus (e.g. Panchal et al 2011; Baldos et al 2014; Bellairs & Caswell 2016), whereas species with restricted distribution ranges are much less studied, yet, many of them are a high priority for use in restoration. For instance, relatively little literature is available about grass species typical of the Kimberley region of north‐Western Australia, including species belonging to genera such as Triodia , Eriachne or Cymbopogon (Fesuk 2006; Bellairs & Caswell 2016; Erickson et al 2016).…”