A comparative study of desiccation responses of seeds of Asian Evergreen Oaks, Quercus subgenus Cyclobalanopsis and Quercus subgenus Quercus

Xia, Ke; Daws, Matthew I.; Hay, Fiona R.; Chen, Wen-Yun; Zhou, Zhe‐Kun; Pritchard, Hugh W.

doi:10.1016/j.sajb.2011.05.001

Cited by 50 publications

(60 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2 ), whereas acorns from Funing were smaller, less viable and less desiccation tolerant. The recalcitrance/desiccation-sensitivity of Q. sichourensis acorns was previously reported by Xia et al. (2012) .…”

Section: Discussionsupporting

confidence: 57%

“…The rareness of Q. sichourensis results mainly from habitat degradation and from deforestation for timber and agriculture ( Xia et al., 2008 ). However, the desiccation sensitivity (recalcitrance) of its acorns ( Xia et al., 2012 ) might also have limited the regeneration of the species and could potentially led to its continued rareness. The Asian monsoon system, which mainly shapes the Chinese climate, causes distinct wet (May–October) and dry (November–April) seasons across the ranges of Q. sichourensis .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Conservation and fruit biology of Sichou oak (Quercus sichourensis, Fagaceae) – A critically endangered species in China

et al. 2016

View full text Add to dashboard Cite

Several conservation programs have been started for the critically endangered Sichou oak (Quercus sichourensis) since 2007. These programs include detailed field investigations, seedling cultivation and research on the fruit biology of the species. In this study, we first report on the five mature individual trees found in our 9-year field investigation. Thus far, a total of 10 mature individuals have been recorded. All Q. sichourensis trees are healthy and most produce healthy acorns. Acorns of Q. sichourensis are large with dry masses of 8.0–14.0 g. These acorns had high moisture contents at collection and died shortly after (7–28 d) when dried with silica gel. Characteristics of Q. sichourensis acorns varied between populations. Compared with the acorns from Funing, the acorns collected from Ceheng were bigger, more viable (germination percentage was up to 96%), less sensitive to desiccation, and germinated faster. Q. sichourensis occurs in regions with a distinct 5–6 month dry season. Habitat degradation is largely responsible for the rareness of Quercus sichorensis, but desiccation sensitivity of the acorns may also limit the regeneration of the species and potentially lead to its continued rareness. As a species with extremely small populations (PSESP), Q. sichourensis is facing high risk of extinction and should be defined as a Critically Endangered species in the global IUCN Red List.

show abstract

Section: Discussionsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Conservation and fruit biology of Sichou oak (Quercus sichourensis, Fagaceae) – A critically endangered species in China

et al. 2016

View full text Add to dashboard Cite

show abstract

“…However, different ecological factors and evolutionary drivers may result in exceptions. For example, the covering structure (pericarp) of desiccation-sensitive seeds of Quercus schottkyana and Q. franchetii minimises the rate of water loss, which reduces the risk of mortality during postdispersal dry spells (Xia et al 2012a(Xia et al , 2012b. The thick seed coat of the five desiccation-sensitive species in our study may reduce the rate of seed water loss; however, this has not been investigated.…”

Section: Discussionmentioning

confidence: 81%

Seed storage behaviour of 101 woody species from the tropical rainforest of southern China: a test of the seed-coat ratio–seed mass (SCR–SM) model for determination of desiccation sensitivity

et al. 2014

View full text Add to dashboard Cite

The Xishuangbanna tropical rainforest in Yunnan Province is the greatest biodiversity hotspot in China. However, the biodiversity of this region is under threat, making seed conservation through seed and/or germplasm banking particularly urgent and crucial. Seed desiccation sensitivity limits the possibility of seed banking of 47% of tropical rainforest species. Thus, knowing if a species has desiccation-sensitive seeds is an important first step in seed banking; however, often resources are limited, making it difficult to determine storage behaviour for all the species in a region. Prediction of seed sensitivity using the SCR-SM model based on seed-coat ratio (SCR) and seed dry mass (SM) might be an alternative for determining desiccation sensitivity of seeds of each species. Here, seed-desiccation sensitivity of 101 woody species from the Xishuangbanna tropical forest were analysed using this model, and physiological determinations were made for a total of 25 species. Seed storage behaviour for 59 species was used for model validation, and storage behaviour of 88% of these species was successfully predicted. Seed storage behaviour of 83% of the 59 species was successfully predicted using the 1000-seed weigth-moisture content (TSW-MC) criteria, which include seeds with 1000-seed weight >500 g and seed moisture content at shedding of 30 -70%. The two predictive methods were subsequently used to predict seed desiccation sensitivity for another 42 species from Xishuangbanna whose storage behaviour was uncertain. Our results indicated that~50% of the species in Xishuangbanna are likely to have desiccation-sensitive seeds.Journal compilation Ó CSIRO 2014 www.publish.csiro.au/journals/ajb PðD À SÞ ¼ e 3:269À9:974aþ2:156b 1 þ e 3:269À9:974aþ2:156b ;where a is SCR and b is log 10 (seed mass) in g. For estimation of P(D-S), seed mass should range between 0.01 mg and 24 g, and SCR between 0 and 1. When P(D-S) > 0.5, seeds are likely to be desiccation-sensitive, and when P(D-S) < 0.5 seeds are likely to be desiccation-tolerant. The TSW-MC criteria for identificationAccording to the TSW-MC criteria (Chin et al. 1984;Hong and Ellis 1996), seeds with a TSW of >500 g and MC of >30% are desiccation-sensitive. In our study, seed storage behaviour of 306 Australian Journal of Botany Q. Lan et al.

show abstract

“…Seed storage behaviour continues to be determined experimentally for diverse species (e.g. Xia et al , 2012 ; Han and Sun, 2013 ; Jayasuriya et al , 2013 ) and, if these traits are routinely collected in such studies, this model might be refined (or indeed, refuted). For the time being, while it may not be possible to make accurate measurements of these traits in the field, it should nonetheless be possible to identify species that could potentially show non-orthodox seed storage behaviour, for which making a large collection for conventional seed bank storage might be a waste of time and resources, without first carrying out tests to check for desiccation sensitivity.…”

Section: Ability To Storementioning

confidence: 99%

Advances in seed conservation of wild plant species: a review of recent research

Hay

Probert

2013

Conservation Physiology

208

177

View full text Add to dashboard Cite

show abstract

A comparative study of desiccation responses of seeds of Asian Evergreen Oaks, Quercus subgenus Cyclobalanopsis and Quercus subgenus Quercus

Cited by 50 publications

References 16 publications

Conservation and fruit biology of Sichou oak (Quercus sichourensis, Fagaceae) – A critically endangered species in China

Conservation and fruit biology of Sichou oak (Quercus sichourensis, Fagaceae) – A critically endangered species in China

Seed storage behaviour of 101 woody species from the tropical rainforest of southern China: a test of the seed-coat ratio–seed mass (SCR–SM) model for determination of desiccation sensitivity

Advances in seed conservation of wild plant species: a review of recent research

Contact Info

Product

Resources

About