A comparison Study of Permeable and Impermeable Seed Coats of Legume Seed Crops Reveals the Permeability Related Structure Difference. | [Pakistan Journal of Botany • 2017]

Author(s):

1. ZHIHUI LUAN: School of Life Sciences, Changchun Normal University,Changchun City, Jilin Province, 130032,China

2. JIMIN ZHAO: Changchun University,Changchun City, Jilin Province, 130022,China

3. DIANKUN SHAO: Jilin Provincial Institute of Forest Inventory and Planning,Changchun City, Jilin Province, 130022,China

4. DAOWEI ZHOU: Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences,Changchun City, Jilin Province, 130102,China

5. LIHUI ZHANG: School of Life Sciences, Changchun Normal University,Changchun City, Jilin Province, 130032,China

6. WEI ZHENG: Jilin Provincial Institute of Education,Changchun City, Jilin Province, 130022,China

7. QI SUN: School of Life Sciences, Changchun Normal University,Changchun City, Jilin Province, 130032,China

Abstract:

Impermeability of Legume seeds is commonly related to physicaldormancy, which is useful for seed preservation but problematical for the soybean food industry. The primary aim of this study was tocharacterize the structure difference between permeable and impermeable seed coats, revealing thewater-controlling structures and demonstrating the water uptake process. Threemeasurements of water uptakefor four Legume species were carried out. The general anatomy of micropyle and seed coat were observed by scanning electron microscopy (SEM). Dye tracking was carried out to investigate the pathway of water movement during imbibition. The mature seed coat of four species contained three layers of cells. SEM observationsrevealed that the impermeable coat differs from the permeable one. Layer thickness has no direct relationship to the permeability of Legume seeds. The micropyle opening could be observed in permeable seed coats. Osteosclereids could impede the uptake of water; the layer of the osteosclereid near the embryo is hydrophilic and distal sideis hydrophobic. The present research provided a varietyof information related to the permeability of Legume seeds. The coat structures of permeable and impermeable micropyles are different in several aspects. A novel finding is that the outer surface of the osteosclereid layer is essential to permeability.

Page(s): 1435-1441

DOI: DOI not available

Published: Journal: Pakistan Journal of Botany, Volume: 49, Issue: 4, Year: 2017

Keywords:

Seed coat , Impermeable seeds , Micropyle , Osteosclereid , Permeable seeds

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