Segesta
ActiveLactuca sativa L. · Lettuce
BLUMEN GROUP S.P.A
IT
2 records
Diseases
Lettuce tissue necrosis
Lactuca sativa L.
Tissue necrosis in lettuce is a symptom complex caused by infectious pathogens (fungi, viruses, bacteria) as well as physiological stresses or genetic incompatibility during hybridization.
In the reference 424 varieties crop Lettuce, where this is mentioned in the description.
Infectious causes of necrosis include Fusarium wilt, caused by the fungus Fusarium oxysporum f. sp. lactucae (accompanied by vascular and root necrosis), viral infections such as LNYV or INSV, and bacterial leaf spot caused by Xanthomonas vitians. Root rots, provoked by Pythium spp., lead to secondary tissue necrosis due to disruption of plant nutrition.
Physiological necrosis develops independently of pathogens under the influence of high temperatures, water deficit, and mechanical damage, leading to the death of parenchyma cells. Genetically determined necrosis can also occur as a result of an autoimmune reaction due to the incompatibility of NLR gene alleles in seedlings.
Resistance to necrotic lesions caused by pathogens is genetically controlled: monogenic resistance has been described for protection against Fusarium oxysporum, and for protection against the INSV virus, quantitative trait loci (QTLs) have been identified, such as qINSV2.1, localized on the second chromosome.
General information about the subject — on the page Tissue necrosis.
Varieties of Lettuce mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Salurek
ActiveLactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
NL
4 records
Prunaï
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
FR
3 records
Parabole
ActiveLactuca sativa L. · Lettuce
Syngenta Crop Protection AG
NL
4 records
Ostria
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
NuansaÏ
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
5 records
Murielle
ActiveLactuca sativa L. · Lettuce
ReinSaat KG
AT
2 records
Melivo
Application submittedLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
3 records
Massimina
TerminatedLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
FR
3 records
Lysian
TerminatedLactuca sativa L. · Lettuce
Syngenta Crop Protection AG
NL
4 records
Latoya
ActiveLactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
NL
4 records
Konzugo
ActiveLactuca sativa L. · Lettuce
Syngenta Crop Protection AG
NL
4 records
Kardigon
TerminatedLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
FR
4 records
Ikarina
ActiveLactuca sativa L. · Lettuce
Syngenta Crop Protection AG
NL
4 records
Irenas
TerminatedLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
Glorinice
ActiveLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
2 records
Flamingo
ActiveLactuca sativa L. · Lettuce
Syngenta Crop Protection AG
NL
4 records
Dilago
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
3 records
Dianita
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
3 records
Cydonia
TerminatedLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
2 records
Crispenza
ActiveLactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
NL
4 records
Dalila
ActiveLactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
FR
2 records
Cimano
ActiveLactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
NL
4 records
Cardanas
ActiveLactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
3 records