AY Honors/Fungi/Rust infection - Revision history

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W126jep moved page Adventist Youth Honors Answer Book/Nature/Fungi/Rust infection to AY Honors/Fungi/Rust infection without leaving a redirect: Part of translatable page "Adventist Youth Honors Answer Book/Nature/Fungi/Rust infection"

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[[Image:Rustinfection.JPG|thumb|450px|Rust infection]]
Rust occurs on many species of plant, but in most cases any one species of rust can only infect one species of plant. The following describes the infection process of asexual spores.

;Spore Attachment:
When a rust spore lands on a plant surface it needs to attach to it, or it would simply be washed off. First, weak, hydrophobic interactions are formed between the spore and the plant cell surface. Then unknown signals cause the production of a substance called ''adhesin''. This will stick the spore irreversibly to the plant surface. Once attached, the spore will germinate.

;Germ Tube Elongation:
Rust fungi penetrate the plant by using the natural pores on the underside of a leaf, but first the growing germ tube must locate it. The germ tube grows in a random manner until it reaches a ridge. At this point it will start to grow perpendicular to the ridge, greatly increasing its chances of locating a pore (called a ''stomata'').

;Appresorium Formation:
The stomata is the site of a structure called an ''appresorium'' that functions to both firmly anchor the fungus and aid in penetration. From the appresorium an infection peg grows down into the plant and between the leaf cells.

;The Haustoria:
Rust fungi gain their nutrients from living cells. This requires a specialized penetration of the fungi into a living plant cell called a ''haustoria''. This develops from a haustorial mother cell. The plant cell membrane surrounds the main haustorial body. An iron- and phosphorus-rich neck band bridges the plant and fungal membranes and acts as a seal preventing the escape of nutrients into the plant. The rust fungi will then continue to grow and invade the plant until it is ready to make new spores.
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Jomegat: /* Intro */

2008-04-06T01:44:55Z

Intro

Jomegat: Transwiki:Rust (fungus) moved to Adventist Youth Honors Answer Book/Nature/Fungi/Rust infection: transwiki adoption

2008-04-06T01:43:25Z

Transwiki:Rust (fungus) moved to Adventist Youth Honors Answer Book/Nature/Fungi/Rust infection: transwiki adoption

Jomegat: rework text to simplify wording, add illustration

2008-04-06T01:41:56Z

rework text to simplify wording, add illustration

Jomegat: reduce, reword, and dewikify

2008-04-06T01:34:09Z

reduce, reword, and dewikify

← Older revision		Revision as of 01:44, 6 April 2008
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−	[[Image:Rustinfection.JPG\|Rust infection]]	+	[[Image:Rustinfection.JPG\|thumb\|450px\|Rust infection]]
	Rust occurs on many species of plant, but in most cases any one species of rust can only infect one species of plant. The following describes the infection process of asexual spores.		Rust occurs on many species of plant, but in most cases any one species of rust can only infect one species of plant. The following describes the infection process of asexual spores.

@@ Line 1: / Line 1: @@
-[[Image:Bruine roest op tarwe (Puccinia recondita f.sp. tritici on Triticum aestivum).jpg|thumb|330px|''Puccinia recondita'']]
+[[Image:Rustinfection.JPG|Rust infection]]
 Rust occurs on many species of plant, but in most cases any one species of rust can only infect one species of plant. The following describes the infection process of asexual spores.
@@ Line 14: / Line 13: @@
 ;The Haustoria:
 Rust fungi gain their nutrients from living cells. This requires a specialized penetration of the fungi into a living plant cell called a ''haustoria''. This develops from a haustorial mother cell. The plant cell membrane surrounds the main haustorial body. An iron- and phosphorus-rich neck band bridges the plant and fungal membranes and acts as a seal preventing the escape of nutrients into the plant.  The rust fungi will then continue to grow and invade the plant until it is ready to make new spores.

@@ Line 1: / Line 1: @@
-:''This article is about the fungus. For the corrosion process, see [[rust]].''
+[[Image:Bruine roest op tarwe (Puccinia recondita f.sp. tritici on Triticum aestivum).jpg|thumb|330px|''Puccinia recondita'']]
-'''Rusts''' are [[fungi]] of the order '''Uredinales'''. Many of these species are plant [[parasites]]. Some are superficially similar to the [[smut (fungus)|smuts]], although their relation to each other is not clear. The taxonomy of Urediniomycota, as a whole, is in a state of flux.
+Rust occurs on many species of plant, but in most cases any one species of rust can only infect one species of plant. The following describes the infection process of asexual spores.
-Many of the rusts have two or more hosts ([[heteroecious]]) and up to five spore stages. However they most commonly reproduce via [[asexual]] [[spore]] production. Their spores are airborne and can travel great distances. They mostly cause [[foliar]] infections.
+;Spore Attachment:
-The group received its common name from the fact that some species have a reddish [[spore]] stage, which resembles the corrosion process known as [[rust]].
+;Germ Tube Elongation:
-==Infection Process==
+;Appresorium Formation:
-Rust occurs on many species of plant, but in most cases any one species of rust can only infect one species of plant. The following describes the infection process of asexual spores. A picture summarizing the process can be found in the gallery below.
+;The Haustoria:
+Rust fungi gain their nutrients from living cells. This requires a specialized penetration of the fungi into a living plant cell called a ''haustoria''. This develops from a haustorial mother cell. The plant cell membrane surrounds the main haustorial body. An iron- and phosphorus-rich neck band bridges the plant and fungal membranes and acts as a seal preventing the escape of nutrients into the plant.  The rust fungi will then continue to grow and invade the plant until it is ready to make new spores.

@@ Line 14: / Line 14: @@
 <!--T:4-->
 ;Appresorium Formation:
-The stomata is the site of a structure called an ''appresorium'' that functions to both firmly anchor the fungus and aid in penetration.  From the appresorium an infection peg grows down into the plant and between the leaf cells.
+The stomata is the site of a structure called an ''appresorium'' that functions to both firmly anchor the fungus and aid in penetration. From the appresorium an infection peg grows down into the plant and between the leaf cells.
 <!--T:5-->
 ;The Haustoria:
-Rust fungi gain their nutrients from living cells. This requires a specialized penetration of the fungi into a living plant cell called a ''haustoria''. This develops from a haustorial mother cell. The plant cell membrane surrounds the main haustorial body. An iron- and phosphorus-rich neck band bridges the plant and fungal membranes and acts as a seal preventing the escape of nutrients into the plant.  The rust fungi will then continue to grow and invade the plant until it is ready to make new spores.
+Rust fungi gain their nutrients from living cells. This requires a specialized penetration of the fungi into a living plant cell called a ''haustoria''. This develops from a haustorial mother cell. The plant cell membrane surrounds the main haustorial body. An iron- and phosphorus-rich neck band bridges the plant and fungal membranes and acts as a seal preventing the escape of nutrients into the plant. The rust fungi will then continue to grow and invade the plant until it is ready to make new spores.
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