Morphology, histochemistry, and ultrastructure of foliar mucilage-producing trichomes of Harpagophytum procumbens (Pedaliaceae)

Yougasphree NAIDOO; Samia HENEIDAK; Arvind BHATT; Nazeera KASIM; Gonasageran NAIDOO

doi:https://doi.org/10.3906/bot-1211-60

Makale detayları

Morphology, histochemistry, and ultrastructure of foliar mucilage-producing trichomes of Harpagophytum procumbens (Pedaliaceae)

Yazarlar:

Yougasphree NAIDOO | Samia HENEIDAK | Arvind BHATT | Nazeera KASIM | Gonasageran NAIDOO

Yayıncı:

TUBITAK

Ana Başlıklar:

Bitkiler

Dergi:

Turkish Journal of Botany 2014 Vol.38 Issue 1, pp.60-67

Belge Tipi:

Makale

Yayın Tarihi:

5/2014

Belge Dili:

İngilizce

Document ID (Org No.):

2000722483

Sıklık:

İki Aylık

eISSN:

1303-6106

pISSN:

1300-008X

DOI:

https://doi.org/10.3906/bot-1211-60

Özet:

 

The morphology, histochemistry, and ultrastructure of foliar mucilage-producing trichomes of Harpagophytum procumbens are investigated using a combination of light and electron microscopy. The leaves of H. procumbens bear short and long glandular trichomes comprising 1 or 2 basal epidermal cells, a stalk of 1-3 cells, a short neck cell, and a head of 2-5 cells. These trichomes are distributed on both leaf sides with a greater abundance on the abaxial side. Both types of trichomes secrete copious amounts of secretion as droplets onto the leaf surface, and the release occurs through micropores in the head cuticles. The secreted material is mainly constituted of mucilaginous polysaccharides, in addition to phenolic compounds and total lipids. The stalk surfaces of long trichomes are densely covered by numerous micropapillae helping the mucilage droplets to slide onto the leaf surface. The short and long trichomes have a similar ultrastructure: the secretory head cells are cytoplasmically dense due to the abundance of mitochondria, ribosomes, small vacuoles, plastids, Golgi bodies, and elements of endoplasmic reticulum. Golgi-derived vesicles are developed in the head cells, and each plastid contains large starch grains.

 

The morphology, histochemistry, and ultrastructure of foliar mucilage-producing trichomes of Harpagophytum procumbens are investigated using a combination of light and electron microscopy. The leaves of H. procumbens bear short and long glandular trichomes comprising 1 or 2 basal epidermal cells, a stalk of 1-3 cells, a short neck cell, and a head of 2-5 cells. These trichomes are distributed on both leaf sides with a greater abundance on the abaxial side. Both types of trichomes secrete copious amounts of secretion as droplets onto the leaf surface, and the release occurs through micropores in the head cuticles. The secreted material is mainly constituted of mucilaginous polysaccharides, in addition to phenolic compounds and total lipids. The stalk surfaces of long trichomes are densely covered by numerous micropapillae helping the mucilage droplets to slide onto the leaf surface. The short and long trichomes have a similar ultrastructure: the secretory head cells are cytoplasmically dense due to the abundance of mitochondria, ribosomes, small vacuoles, plastids, Golgi bodies, and elements of endoplasmic reticulum. Golgi-derived vesicles are developed in the head cells, and each plastid contains large starch grains.

Makale detayları

Morphology, histochemistry, and ultrastructure of foliar mucilage-producing trichomes of Harpagophytum procumbens (Pedaliaceae)

Yazarlar: Yougasphree NAIDOO | Samia HENEIDAK | Arvind BHATT | Nazeera KASIM | Gonasageran NAIDOO

Yayıncı: TUBITAK

Ana Başlıklar: Bitkiler

Dergi: Turkish Journal of Botany 2014 Vol.38 Issue 1, pp.60-67

Belge Tipi: Makale

Yayın Tarihi: 5/2014

Belge Dili: İngilizce

Document ID (Org No.): 2000722483

Sıklık: İki Aylık

eISSN: 1303-6106

pISSN: 1300-008X

DOI: https://doi.org/10.3906/bot-1211-60

Sayı

Yazarlar:

Yougasphree NAIDOO | Samia HENEIDAK | Arvind BHATT | Nazeera KASIM | Gonasageran NAIDOO

Yayıncı:

TUBITAK

Ana Başlıklar:

Bitkiler

Dergi:

Turkish Journal of Botany 2014 Vol.38 Issue 1, pp.60-67

Belge Tipi:

Makale

Yayın Tarihi:

5/2014

Belge Dili:

İngilizce

Document ID (Org No.):

2000722483

Sıklık:

İki Aylık

eISSN:

1303-6106

pISSN:

1300-008X

DOI:

https://doi.org/10.3906/bot-1211-60