Abstract
Limonium bicolor is a typical exo-recretohalophyte with multi-cellular salt glands. A differential interference contrast (DIC) microscope were applied to investigate the pattern of salt gland distribution in L. bicolor at the individual level. For a single mature leaf, more salt glands are distributed in the leaf central and apical regions than leaf base. For the leaves in different developmental stages, firstly, the density of salt glands linearly decreased at the beginning of leaf expansion and kept a relatively constant value in the later periods, which was mainly due to the rapid expansion of epidermal cells. Secondly, the total number of glands per leaf showed a reversed trend compared to the density of salt glands. These results suggested that the salt gland density was adapted to the leaf age and area as more and more salt accumulated in the saline soils.
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Claims 6
Claim · model-written summary
Mature leaves had more salt glands in central and apical regions than at the base.
Verbatim
e0“more salt glands are distributed in the leaf central and apical regions than leaf base”
t0“Limonium bicolor”
Claim · model-written summary
Salt gland density fell linearly at the start of leaf expansion.
- Taxon
- Limonium bicolorLimonium bicolort0
- Organ / stage
- beginning of leaf expansione0
- Outcome
- density of salt glandse0
- Direction
- decreasede0
Verbatim
e0“the density of salt glands linearly decreased at the beginning of leaf expansion”
t0“Limonium bicolor”
Claim · model-written summary
Salt gland density remained relatively constant later in leaf expansion.
- Taxon
- Limonium bicolorLimonium bicolort0
Verbatim
e0“kept a relatively constant value in the later periods”
e1“the density of salt glands linearly decreased at the beginning of leaf expansion”
t0“Limonium bicolor”
Claim · model-written summary
Rapid epidermal cell expansion was proposed to explain the early salt gland density decrease.
- Taxon
- Limonium bicolorLimonium bicolort0
- Outcome
- density of salt glandse0
- Qualifier
- rapid expansion of epidermal cellse0
Verbatim
e0“the density of salt glands linearly decreased at the beginning of leaf expansion and kept a relatively constant value in the later periods, which was mainly due to the rapid expansion of epidermal cells”
t0“Limonium bicolor”
Claim · model-written summary
Total glands per leaf followed the reverse trend from salt gland density.
- Taxon
- Limonium bicolorLimonium bicolort0
- Outcome
- total number of glands per leafe0
- Direction
- reversed trende0
- Comparator
- density of salt glandse0
Verbatim
e0“the total number of glands per leaf showed a reversed trend compared to the density of salt glands”
t0“Limonium bicolor”
Claim · model-written summary
The authors interpret salt gland density as adapted to leaf age and area as soil salt accumulates.
- Taxon
- Limonium bicolorLimonium bicolort0
- Organ / stage
- leaf age and areae0
- Outcome
- salt gland densitye0
- Qualifier
- more and more salt accumulated in the saline soilse0
Not reportedDirection
Verbatim
e0“the salt gland density was adapted to the leaf age and area as more and more salt accumulated in the saline soils”
t0“Limonium bicolor”