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Preliminary Study on Water Absorbing Character and Drought Resistance of the Seed of Tibetan Medicine Przewalskia tangutica Maxim(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2013年22期
Page:
164-166
Research Field:
Publishing date:

Info

Title:
Preliminary Study on Water Absorbing Character and Drought Resistance of the Seed of Tibetan Medicine Przewalskia tangutica Maxim
Author(s):
MA Zi-lin
Vegetable Office,Xunhua County Agriculture Bureau of Qinghai Province,Xunhua,Qinghai 811100
Keywords:
Przewalskia tangutica Maxim; seed; water absorbing character; drought resistance; critical water potential
PACS:
R 282.2
DOI:
-
Abstract:
Taking Przewalskia tangutica as material,the water stress value was studied by observing the seed morphology and determination of the weight of the absorbent and germination test with different concentrations of PEG.The results showed that seed of Przewalskia tangutica Maxim was surface dark brown,honeycomb-like protrusions,shape subreniform,slightly flat type,the seed length was about 3.0±0.4 mm,the seed width was about 2.5±0.3 mm,the seed thickness was about 1.1±0.2 mm,the seed grain weight was 6.187±1.254 g;the fastest water absorption rate was half in an hour,the rate slowed down in 0.5～6.0 hours,the rate became faster in 6～10 hours,the rate became slower after 10 hours,absorbent stopped at 24 hours;with the increase of PEG concentrations,germination rate decreased rapidly,when PEG concentrations was 12%,germination rate was 0.0%,the critical water potential of germination was -0.28 MPa on water stress condition.

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Last Update: 2014-08-07