The symbiotic relationship between nitrogen-fixing bacteria and leguminous plants involves complex signaling and structural modifications in the root. Which of the following accurately describes the role of NOD factors in this interaction?
Plant hormones that promote bacterial growth within root nodules
Bacterial signals that trigger root hair curling and cortical cell division
Enzymes produced by the plant to break down bacterial cell walls
Proteins that transport nitrogen from bacteria to plant cells
Related Questions
Select the correct statements. I. From the region of elongation, some of the epidermal cells from root hairs. II. Pneumatophores are seen in Rhizophora. III. Adventitious roots are seen in the banyan tree. IV. Maize and sugarcane have prop roots.
I, II and III
II, III and IV
I and IV
II and III
Adventitious tuberous roots are found in
Beta Vulgaris
Daucus Carota
Ipomoea batatus
Raphanus Sativus
Plants with produce characteristic pneumatophores and show vivipary belong to
Hydrophytes
Mesophytes
Halophytes
psammophytes
A mutant plant exhibits stunted root growth and reduced gravitropic response. Microscopic analysis reveals disorganized columella cells in the root cap. Which of the following is the MOST likely cause of this phenotype?
Increased production of cytokinin in the root tip
Disruption of amyloplast sedimentation and auxin redistribution
Overexpression of genes involved in cell elongation
Enhanced sensitivity to ethylene
The photosynthetic or assimilatory roots are observed in
Tinospora and some epiphytic orchids
Cuscuta and Viscum
Taeniophyllum and Trapa
Vanda and Drosera
Which of the following is a total root parasite?
Cuscuta
Rafflesia
Santalum
Striga
Pneumatophores are positively
Positively geotropic
Negatively geotropic
Positively hydrotropic
Negatively phototropic
(A) Fibrous root system is adventitious in origin
(R) All adventitious roots are fibrous
Both (A) and (B) are correct
Both (A) and (B) are incorrect
(A) is true but (R) is false
(A) is false but (R) is true
Which of the following groups of plants are propagated through underground roots?
Bryophyllum and Kalanchoe
Ginger, potato, onion and zimikand
Pistia, Chrysanthemum and pineapple
Sweet potato, Asparagus, Tapioca and Dahlia
Which of the following is a correct statement?
Orchid has palmate fleshy roots
Pandanus has stilt roots
Sweet potato has root tubers
All of the above
