Effects of carbon and nitrogen content on seed germination of calabrian pine (Pinus brutia) populations

Caliskan, Servet; Makineci, Ender

doi:10.4067/s0717-92002015000300010

Cited by 8 publications

(3 citation statements)

References 40 publications

(43 reference statements)

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“…Modeling studies have shown that increased adult mortality could potentially reduce this adaptation lag by allowing better-adapted seedling genotypes to regenerate more quickly in the resulting gaps (Kuparinen et al 2010). Further, increased allocation of C and N to seeds has been shown to increase germination potential, demonstrating the simultaneous benefit of increased seed output and potential recruitment in trees investing more resources in seed (Caliskan and Makineci 2015). Thus, flight strategies may increase adaptive potential in stressful environments.…”

Section: Evolutionary Implicationsmentioning

confidence: 99%

Fight or flight? Potential tradeoffs between drought defense and reproduction in conifers

2019

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Plants frequently exhibit tradeoffs between reproduction and growth when resources are limited, and often change these allocation patterns in response to stress. Shorter-lived plants such as annuals tend to allocate relatively more resources toward reproduction when stressed, while longer-lived plants tend to invest more heavily in survival and stress defense. However, severe stress may affect the fitness implications of allocating relatively more resources to reproduction versus stress defense. Increased drought intensity and duration have led to widespread mortality events in coniferous forests. In this review, we ask how potential tradeoffs between reproduction and survival influence the likelihood of drought-induced mortality and species persistence. We propose that trees may exhibit what we call ‘fight or flight’ behaviors under stress. ‘Fight’ behaviors involve greater resource allocation toward survival (e.g., growth, drought-resistant xylem and pest defense). ‘Flight’ consists of higher relative allocation of resources to reproduction, potentially increasing both offspring production and mortality risk for the adult. We hypothesize that flight behaviors increase as drought stress escalates the likelihood of mortality in a given location.

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Section: Evolutionary Implicationsmentioning

confidence: 99%

Fight or flight? Potential tradeoffs between drought defense and reproduction in conifers

2019

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“…Thus, it is reasonable that A. tauschii seeds in distal diaspore/seed positions with significantly higher carbon content and C:N ratio and slightly higher nitrogen content live a relatively shorter time than basal ones. In Pinus brutia seeds, carbon content and combined carbon and nitrogen content were significantly positively correlated with germination percentages (Caliskan and Makineci, 2015), while in A. tauschii , both carbon content and C: N ratio were positively correlated with germination, but nitrogen content did not correlate with germination. Starch in seeds can be degraded into soluble sugar, which contributes to seed longevity (Sun and Leopold, 1993; Bernal‐Lugo and Leopold, 1992, 1995).…”

Section: Discussionmentioning

confidence: 99%

“…The dynamic balance between abscisic acid (ABA) and gibberellins (GA) is an important factor in controlling dormancy/germination (Finch‐Savage and Leubner‐Metzger, 2006; Klupczyńska and Pawlowski, 2021) and contributes to seed longevity (Sano et al, 2016; Ren et al, 2020). Combined concentrations of carbon and nitrogen were significantly correlated with germination percentages of Pinus brutia seeds (Caliskan and Makineci, 2015) and may cause seed mortality in soil (Basto et al, 2015). Soluble sugars in seeds were significantly positively correlated with the seed germination rate (speed) of six wild grassland species, e.g.…”

Section: Introductionmentioning

confidence: 99%

Environmental and seed‐position effects on viability and germination of buried seeds of an invasive diaspore‐heteromorphic annual grass

Wang,

Baskin,

Baskin

et al. 2024

Physiologia Plantarum

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Environmental factors, such as temperature and moisture, and plant factors, such as seed position on the mother plant, can affect seed viability and germination. However, little is known about the viability and germination of seeds in different positions on the mother plant after burial in soil under natural environmental conditions. Here, diaspores from three positions on a compound spike and seeds from two/three positions in a diaspore of the invasive diaspore‐heteromorphic annual grass Aegilops tauschii were buried at four depths for more than 2 years (1–26 months) under natural conditions and viability and germination monitored monthly. Viability of seeds in each diaspore/seed position decreased as burial depth and duration increased and was associated with changes in soil temperature and moisture. Germination was highest at 2 cm and lowest at 10 cm soil depths, with peaks and valleys in autumn/spring and winter/summer, respectively. Overall, seeds in distal diaspore and distal seed positions had higher germination percentages than those in basal diaspore and basal seed positions, but basal ones lived longer than distal ones. Chemical content of fresh diaspores/seeds was related to diaspore/seed position effects on seed germination and viability during burial. We conclude that seeds in distal diaspores/seed positions have a ‘high risk’ strategy and those in basal positions a ‘low risk’ strategy. The two risk strategies may act as a bet‐hedging strategy that spreads risks of germination failure in the soil seed bank over time, thereby facilitating the survival and invasiveness of A. tauschii.

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Influence of Seed Nitrogen and Carbon on Germination in Different Populations of Stone Pine

et al. 2021

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Effects of carbon and nitrogen content on seed germination of calabrian pine (Pinus brutia) populations

Cited by 8 publications

References 40 publications

Fight or flight? Potential tradeoffs between drought defense and reproduction in conifers

Fight or flight? Potential tradeoffs between drought defense and reproduction in conifers

Environmental and seed‐position effects on viability and germination of buried seeds of an invasive diaspore‐heteromorphic annual grass

Influence of Seed Nitrogen and Carbon on Germination in Different Populations of Stone Pine

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