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Judy Harrington and Scott Reid

Distichlis spicata var. stricta (Torrey) Beetle is a native grass that tolerates salt, high pH, and some heavy metals. It has been proposed for use in several challenging environments, including mine spoils and salt-impacted areas of golf courses, but its widespread use has been hindered by several factors, one of which is seed dormancy. Dormancy appears to be coat-imposed and can be overcome by scarification in relatively young seed lots. Thirteen-year-old seeds germinated better without scarification. Seeds were tested at several constant and alternating temperatures. Temperatures around 30 °C seemed to give the highest percentage germination, approaching the viability that was shown by tetrazolium chloride tests for each seed lot. Alternating temperatures increased the germination of unscarified seeds but not as much as scarification did. Light appears to be unnecessary for germination.

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Qi Zhang, Kevin Rue, and Jeanna Mueller

Plant growth and development is affected by various environmental stresses such as drought, salinity, and suboptimal temperatures. During the seed germination and seedling growth stages, plants are the most vulnerable to stresses ( Almansouri et al

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J. Ryan Stewart and Irene McGary

, ecosystems in which several congeners of new jersey tea are native, are dependent on fire for renewal and regeneration ( Keeley, 1991 ; McMillan Browse, 1994 ), which is reflected in the observation that seed germination of several ceanothus ( Ceanothus spp

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Jenjira Chumpookam, Huey-Ling Lin, and Ching-Chang Shiesh

). The compound has recently been referred to as "karrikinolide" ( Commander et al., 2008 ). The action of smoke in promoting seed germination in many species is attributed to the presence of this compound ( Soos et al., 2009 ). Dixon and Roche (1995

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Kun Jia, Michelle DaCosta, and J. Scott Ebdon

adequate density and uniformity for play ( Green et al., 2018 ). Adverse conditions such as cold soil temperatures (≈10 °C) typical of early spring plantings in temperate areas of the northeastern United States can delay seed germination and diminish

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Mohamad-Hossein Sheikh-Mohamadi, Nematollah Etemadi, Ali Nikbakht, Mostafa Farajpour, Mostafa Arab, and Mohammad Mahdi Majidi

becoming a main environmental factor limiting seed germination and seedling growth in arid and semiarid regions ( Sekmen et al., 2012 ). Different levels of salinity stress can affect turfgrass adversely. These may include a series of morphological

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Tyler Hoskins and Ryan N. Contreras

durations to evaluate the effects on seed germination, 2) to evaluate growth effects from various treatments, and 3) to determine whether the relative frequency of polyembryony is affected by EMS treatment. Materials and Methods Plant material and experiment

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W. H. Cram


Germination of stratified seed was highest for immature fruit of red elder (Sambucus pubens Michx.), harvested in early August, and for fruit of Tatarian honeysuckle (Lonicera tatarica L.), harvested in mid-August. Neither specific gravity nor moisture content of the fruit were related to seed germination.

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Song-jun Zeng, Zhi-lin Chen, Kun-lin Wu, Jian-xia Zhang, Cheng-ke Bai, Jaime A. Teixeira da Silva, and Jun Duan

. Asymbiotic seed germination and in vitro seedling development of Nothodoritis zhejiangensis . ( A ) Flowering specimen of N. zhejiangens growing on the tree branches of Cornus officinalis . ( B ) Seed germination and protocorm development in vitro. ( C