Geographical and land-use effects on seed-mass variation in common grassland plants

2012 ◽  
Vol 13 (5) ◽  
pp. 395-404 ◽  
Author(s):  
Eva Völler ◽  
Harald Auge ◽  
Daniel Prati ◽  
Markus Fischer ◽  
Andreas Hemp ◽  
...  
Keyword(s):  
Land Use ◽  
Seed Mass ◽  
Mass Variation ◽  
Grassland Plants ◽  
Land Use Effects ◽  
Seed Mass Variation

Variations in seed mass variation and spatial distribution pattern in the Gurbantunggut Desert

2014 ◽  
Vol 34 (23) ◽  
Author(s):  
王琳 WANG Lin ◽  
刘彤 LIU Tong ◽  
韩志全 HAN Zhiquan ◽  
刘华峰 LIU Huafeng ◽  
陈正霞 CHEN Zhenxia ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Distribution Pattern ◽  
Seed Mass ◽  
Spatial Distribution Pattern ◽  
Gurbantunggut Desert ◽  
Mass Variation ◽  
Gurbantünggüt Desert ◽  
Seed Mass Variation

Seed mass variation in common plant species in Wanfoshan Natural Reservation Region, Anhui, China

2013 ◽  
Vol 36 (8) ◽  
pp. 739-746 ◽  
Author(s):  
Yan-Song CHEN ◽  
Shou-Biao ZHOU ◽  
Zu-Lan OU ◽  
Zhong-Dong XU ◽  
Xin HONG
Keyword(s):  
Plant Species ◽  
Seed Mass ◽  
Mass Variation ◽  
Common Plant ◽  
Seed Mass Variation ◽  
Common Plant Species

Viability and vigour loss during storage of Rudbeckia mollis seeds having different mass: an intra-specific perspective

2020 ◽  
Vol 30 (2) ◽  
pp. 122-132 ◽  
Author(s):  
Nicholas G. Genna ◽  
Christina Walters ◽  
Héctor E. Pérez
Keyword(s):  
Population Dynamics ◽  
Seed Quality ◽  
Seed Mass ◽  
Seed Viability ◽  
Storage Conditions ◽  
Physiological Status ◽  
Mass Variation ◽  
Lower Mass ◽  
Viability Loss ◽  
Seed Mass Variation

AbstractRecent evidence points to relationships between intra-specific seed mass variation and viability loss in response to ageing stress. However, little is known about how seed quality may change temporally in response to such stress. Here we examined seed–water relations of mass-separated Rudbeckia mollis seeds to better understand physiological status among mass classes. We then evaluated seed viability and vigour changes in response to various storage conditions or post-storage vigour tests (a 41°C, 75% RH stress for up to 45 d). We found similar pre-storage physiology among mass classes. However, seeds of lower mass deteriorated up to 1.5-fold faster than heavier seeds under certain conditions. Stressing seeds after storage resulted in distinct vigour differences among mass classes. For example, vigour in lower mass seeds tended to decline more compared to heavier seeds following storage in a climate-controlled room. Alternatively, vigour loss varied among mass classes following storage in a non-climate-controlled shed. Our results highlight the importance of distinguishing between pre-sowing storage and post-storage vigour effects when quantifying relative levels of viability loss among seeds of different mass. Furthermore, differential responses to storage and ageing stress among mass classes may have important implications for post-storage regeneration and subsequent population dynamics.

Untangling interacting mechanisms of seed mass variation with elevation: insights from the comparison of inter-specific and intra-specific studies on eastern Tibetan angiosperm species

Plant Ecology ◽  
2014 ◽  
Vol 216 (2) ◽  
pp. 283-292 ◽  
Author(s):  
Wei Qi ◽  
Haiyan Bu ◽  
Johannes H. C. Cornelissen ◽  
Chunhui Zhang ◽  
Shuqing Guo ◽  
...  
Keyword(s):  
Seed Mass ◽  
Mass Variation ◽  
Angiosperm Species ◽  
Seed Mass Variation

Analysis of six-decadal seed mass and emergence records in mast species shows little inter-annual variability

2020 ◽  
Author(s):  
Yang Liu ◽  
Yousry A. El-Kassaby
Keyword(s):  
Seed Germination ◽  
Regression Models ◽  
Mass Number ◽  
Economies Of Scale ◽  
Seed Mass ◽  
Mast Seeding ◽  
Climate Variables ◽  
Mass Variation ◽  
Trade Offs ◽  
Seed Mass Variation

AbstractPatterns of crop production in mast species do not track crop-year climate, but instead are regulated by climate cues in prior-years. Whether the pattern of year-to-year seed mass variation is coupled in time with mast seeding, maintaining seed mass-number trade-offs, and coherently driven by similar climate cues as other seed traits (e.g. seed germination) remains unknown. Using ca. 6,000 long-term seed inventory data over the years 1955-2015 in conifers, this retrospective study revealed the temporal patterns of mast species’ seed mass and its associated trait, seed germination. To pinpoint their ecological drivers, pairwise correlation analysis was performed between each trait and seasonal climates in crop year and four prior-years. Using climate variables key to each trait, regression models were constructed to project trait values. Findings showed minor seed mass variation among years, which rejects the generality of seed mass-number trade-offs in many plant species. This result reasonably arises as the economies of scale (compensating benefits) theory are often used to account for mast seeding but not for seed mass. Moreover, final germination fraction also varied little over time, but exhibited an increasing tendency. In addition, we found that temperature-based climate variables drive seed mass, number, and germination variation, but these variables in different seasons of crop year or prior-years did not have equal influences on trait variability. Finally, regression models showed that the number of frost-free days and evapotranspiration are crucial to the three traits and climate in autumn is a critical season, followed by summer and winter. This study holds considerable promise for explaining reproductive strategies of taxonomic groups with mast seeding characteristics in allocating reproductive resources to different life-history traits using ecological signals.

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