Characteristics of Germination of Principal Summer Weeds on Upland Fields

Iwata, Iwaho; Takayanagi, Shigeru

doi:10.3719/weed.1974.33

Cited by 1 publication

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“…Similarly, the seeds of crabgrass ( Digitaria ciliaris Koel.) and curlytop knotweed ( Persicaria lapathifolia L.) could germinate easily after storage in wet conditions (Iwata & Takayanagi ). This might have affected the structure of the pericarp or seed coat.…”

Section: Discussionmentioning

confidence: 99%

Seed heteromorphism in carolina dayflower (Commelina carolinianaWalter)

Matsuo

Sakai

Kawano

2016

Weed Biology and Management

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Carolina dayflower (Commelina caroliniana Walter), infesting soybean (Glycine max L.) fields on northern Kyushu Island, Japan, has seed heteromorphism; that is, it produces two types of seeds: pericarp and naked. However, there is no information about their germination behavior. The purpose of this study was to understand the germination characteristics of carolina dayflower seeds and to clarify the difference between the pericarp and naked seeds. On the shape of the seed, the pericarp seeds were significantly longer than the naked ones, with no significant difference in width or thickness. Both the pericarp and the naked seeds could germinate at >20°C, and at 30°C, their cumulative germination rate at 7 days after sowing was the highest, at >90%. Light had no effect on seed germination. The cumulative germination rate after 7 days, when the seeds had been stored dry, wet or under water at a low temperature, was significantly lower than after storage at room temperature, suggesting that a higher temperature and concentration of oxygen during the seed‐storage period affects the germination of carolina dayflower. However, there was no difference in the germination behavior between the pericarp and the naked seeds.

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Section: Discussionmentioning

confidence: 99%