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Constitutive expression of Brassica juncea annexin, AnnBj2 confers salt tolerance and glucose and ABA insensitivity in mustard transgenic plants.

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Title Constitutive expression of Brassica juncea annexin, AnnBj2 confers salt tolerance and glucose and ABA insensitivity in mustard transgenic plants.
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Creator Ahmed I, Yadav D, Shukla P, T.V. Vineeth, P.C. Sharma, P.B. Kirti.
 
Subject ABA insensitive
ABI4
Annexin
Brassica juncea
Glucose insensitive
Salt tolerance
 
Description Not Available
Annexins belong to a plasma membrane binding (in a calcium dependent manner), multi-gene family of proteins, which play ameliorating roles in biotic and abiotic stresses. The expression of annexin AnnBj2 of Indian mustard is tissue specific with higher expression in roots and under treatments with sodium chloride and abscisic acid (ABA) at seedling stage. The effect of constitutive expression of AnnBj2 in mustard was analyzed in detail. AnnBj2 OE (over expression) plants exhibited insensitivity to ABA, glucose and sodium chloride. The insensitivity/ tolerance of the transgenic plants was associated with enhanced total chlorophylls, relative water
content, proline, calcium and potassium with reduced thiobarbituric acid reactive substances and sodium ion
accumulation. The altered ABA insensitivity of AnnBj2 OE lines is linked to downregulation of ABI4 and ABI5
transcription factors and upregulation of ABA catabolic gene CYP707A2. Furthermore, we found that overexpression of AnnBj2 upregulated the expression of ABA-dependent RAB18 and ABA-independent DREB2B stress marker genes suggesting that the tolerance phenotype exhibited by AnnBj2 OE lines is probably controlled by both ABA-dependent and independent mechanisms.
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Date 2019-12-05T14:19:51Z
2019-12-05T14:19:51Z
2017-09-20
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/28208
 
Language English
 
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Publisher Not Available