Roles of the Af and Tl genes in pea leaf morphogenesis: leaf morphology and pinna anatomy of the heterozygotes

1999 ◽  
Vol 77 (5) ◽  
pp. 611-622 ◽  
Author(s):  
Philip J Villani ◽  
Darleen A DeMason
Keyword(s):  
Pisum Sativum ◽  
Leaf Morphology ◽  
Distal Region ◽  
Proximal Region ◽  
Structural Components ◽  
Leaf Morphogenesis ◽  
Recessive Mutations ◽  
Pisum Sativum L ◽  
Multiple Levels ◽  
Almost All

The leaf blade of Pisum sativum L. possesses proximal leaflets and distal tendrils and is altered by two recessive mutations that affect pinna identity, afila (af) and acacia/tendrilless (tl). Using morphological and histology features we characterized the variation in leaf form and pinna anatomy of the Af and Tl heterozygous genotypes. Our goal was to identify the specific interactions of these genes and the relative influence of each in regulating all structural components of the leaf and pinna phenotypes. The Tl/tl genotypes possess broad tendril - narrow leaflets in the distal region that are histologically more similar to leaflets than to tendrils. The afafTltl leaves have simple tendrils in the distal region and branching complexity that is intermediate between that of aftl and af leaves in the proximal region. Only the most distal tips are slightly expanded. Because the Af and Tl genes interact to affect almost all aspects of leaf and pinna form, they affect development at multiple levels of organization.Key words: acacia, afila, Fabaceae, leaf morphology, leaf anatomy, Pisum sativum.

Acid Phosphatase Activities in Developing Seeds of Pisum sativum L

1977 ◽  
Vol 4 (6) ◽  
pp. 843 ◽  
Author(s):  
DR Murray ◽  
MD Collier
Keyword(s):  
Acid Phosphatase ◽  
Pisum Sativum ◽  
Phosphatase Activity ◽  
Cell Expansion ◽  
Acid Phosphatase Activity ◽  
Minor Components ◽  
Ph Optimum ◽  
Pisum Sativum L ◽  
Almost All ◽  
Pea Seed

The seedcoats contain almost all of the acid phosphatase activity (EC 3.1.3.2) in the pea seed in the earliest stages of expansion. The seedcoat activity is maximal by the end of the period of rapid cell expansion and declines as the embryo matures. The developing cotyledons show a later rise in acid phosphatase activity to a maximum shortly before dehydration. The activity in the embryonic axis shows a marked increase only during dehydration. The acid phosphatase activity in the seedcoats results almost entirely from an isoenzyme with high electrophoretic mobility in 5.5% polyacrylamide gels (RF 0.97). This isoenzyme has not been detected in other tissues from the plant. The phosphatase activity in the cotyledons is accounted for by one major isoenzyme at RF 0.75 and by four minor components. The partially purified enzyme from the seedcoats shows a broad pH optimum from pH 5.0 to pH 6.0. In contrast, the preparation from the cotyledons has an optimum close to pH 5.6 and is slightly more sensitive to inhibition by 0.2 mM PI.

The structure of the stem endodermis in etiolated pea seedlings

1987 ◽  
Vol 65 (7) ◽  
pp. 1514-1519 ◽  
Author(s):  
Fred D. Sack
Keyword(s):  
Endoplasmic Reticulum ◽  
Pisum Sativum ◽  
Cell Elongation ◽  
Proximal Region ◽  
Casparian Strip ◽  
Pisum Sativum L ◽  
Pea Seedlings

Differentiation of the endodermis was examined in third internodes of etiolated Pisum sativum L. cv. Alaska seedlings. The endodermis in young internodes contains large, sedimented amyloplasts; in older internodes, a casparian strip differentiates and the endodermis becomes depleted of starch except for the proximal region of the stem, which retains sedimented amyloplasts and remains graviresponsive. Sedimentation occurs in the hook but does not occur consistently until cells reach the base of the hook, where the axis becomes vertical, rapid cell elongation starts, and amyloplast diameter increases substantially. Contact between endoplasmic reticulum and amyloplasts was observed. Endoplasmic reticulum is not distributed polarly with respect to gravity. No symplastic or apoplastic blockages exist in the endodermis at the level of the stem where lateral gradients may be established during tropic curvature.

Mitigation Effects of 24-Epibrassinolide and Thiourea in Field Pea (Pisum sativum L.) under Drought Stress

2018 ◽  
Vol 34 (2) ◽  
pp. 229-235 ◽  
Author(s):  
Prachi Garg ◽  
◽  
A. Hemantaranjan ◽  
Jyostnarani Pradhan ◽  
◽  
...  
Keyword(s):  
Drought Stress ◽  
Pisum Sativum ◽  
Field Pea ◽  
Pisum Sativum L

МЕТОД ЭКСПРЕСС-ОЦЕНКИ АЛЮМОТОЛЕРАНТНОСТИ У ГОРОХА ПОСЕВНОГО (Pisum sativum L.)

2015 ◽  
Vol 50 (3) ◽  
pp. 353-360
Author(s):  
М.А. ВИШНЯКОВА ◽  
◽  
Е.В. СЕМЕНОВА ◽  
И.А. КОСАРЕВА ◽  
Н.Д. КРАВЧУК ◽  
...  
Keyword(s):  
Pisum Sativum ◽  
Pisum Sativum L
Sign in / Sign up

Export Citation Format

Share Document