Using Growth and Transpiration Phenotyping Under Controlled Conditions to Select Water Efficient Banana Genotypes

TitleUsing Growth and Transpiration Phenotyping Under Controlled Conditions to Select Water Efficient Banana Genotypes
Publication TypeJournal Article
Year of Publication2019
Authorsvan Wesemael J, Kissel E, Eyland D, Lawson T, Swennen R, Carpentier S
JournalFrontiers in Plant Science
Volume10
ISSN1664-462X
KeywordsBIODIVERSITY, climate smart agriculture, phenotyping, Transpiration monitoring, Water Use Effeciency
Abstract

Water deficit is one of the world’s major constraints in agriculture and will aggravate in the future. Banana (Musa spp.) is an important crop that needs vast amounts of water for optimal production. The International Transit Center of Bioversity International holds the world’s biggest collection of banana biodiversity (>1500 accessions). The long-term aim of this research is to evaluate the potential within this collection for climate smart agricultural usage. Therefore we developed a phenotyping setup under controlled environmental conditions and we selected 32 representatives of the Musa biodiversity (29 cultivars and 3 wild relatives) for evaluation. The best performing genotypes accumulated 6-7 times more biomass than the least performing. Eight genotypes (5 ABB, 1 AAB and 2 AAA) invest under osmotic stress significantly more in root growth than in leaf growth. We predict therefore that they have a good potential for a high production under rain fed conditions with a short dry season. To gain more insight in the transpiration physiology, we gravimetrically monitored individual plant transpiration over the diurnal period. All analyzed genotypes showed a marked reduction in transpiration rate in the afternoon. Moreover, the timing of this onset as well as its impact on total transpiration was genotype dependent. This phenomenon was more pronounced in 13 genotypes (8 ABB, 2 AAB, 2AA, 1 BB). Banana is a crop originating from the humid tropics and has developed a strong root pressure to maintain an efficient water and nutrient transport even under saturated relative humidity conditions. Therefore, we hypothesize that the diurnal transpiration decline contributes to a higher water use efficiency without compromising the nutrient transport. Of the 8 genotypes that had the best growth under osmotic stress, all analyzed ABB cultivars have a lower maximal transpiration rate, keep this maximal transpiration for a shorter time and therefore consume less water per day. We conclude that lab models are very useful to study the biodiversity and to identify different traits that contribute to a better drought tolerance/avoidance. We encourage researchers investigating other crops to start exploring their collections.

URLhttps://www.frontiersin.org/articles/10.3389/fpls.2019.00352/full?utm_source=FRN&utm_medium=EMAIL_IRIS&utm_campaign=EMI_FRN_ARTICLEPUBLISHED_COAUTHORS&utm_content=ARTICLE_TITLE
DOI10.3389/fpls.2019.00352
Showing 33 of 33 accessions
Accession Name Pictures Accession number Species / Group SubSpecies / SubGroup Origin Collection Available for distribution
Kluai Tiparot ITC0652 ABB Unknown Unknown ITC
Figue Pomme Géante ITC0769 AAB subgr. Silk Unknown ITC
Khai Thong Ruang ITC0662 AAA subgr. Ibota Thailand ITC
Namwa Khom ITC0659 ABB subgr. Pisang Awak Thailand ITC
Pisang Palembang ITC0450 AAB subgr. Pisang Kelat Malaysia ITC
Foconah ITC0649 AAB subgr. Pome Unknown ITC
Cachaco ITC0643 ABB subgr. Bluggoe Unknown ITC
Zebrina ITC1177 acuminata subsp. zebrina Indonesia ITC
Pelipita ITC0472 ABB Unknown Philippines ITC
Banksii ITC0623 acuminata subsp. banksii Papua New Guinea ITC
Pisang Ceylan ITC1441 AAB subgr. Mysore Unknown ITC
Prata ana ITC0962 AAB subgr. Pome Unknown ITC
Leite ITC0277 AAA subgr. Rio Unknown ITC
Blue Java ITC0361 ABB subgr. Ney Mannan Unknown ITC
Pisang Raja Bulu ITC0843 AAB subgr. Pisang Raja Indonesia ITC
Pisang Bakar ITC1064 AAA subgr. Ambon Indonesia ITC
Dole ITC0767 ABB subgr. Bluggoe Unknown ITC
Grande Naine ITC0180 AAA subgr. Cavendish Unknown ITC
Simili Radjah ITC0123 ABB subgr. Peyan Unknown ITC
Williams ITC0365 AAA subgr. Cavendish Unknown ITC
Gros-Michel ITC1122 AAA subgr. Gros Michel Unknown ITC
Fougamou 1 ITC0101 ABB subgr. Pisang Awak Gabon ITC
Uzakan ITC0825 AAB Unknown Papua New Guinea ITC
Red Dacca ITC0575 AAA subgr. Red Unknown ITC
Mbwazirume ITC1356 AAA subgr. Mutika/Lujugira Unknown ITC
Pisang Berangan
ITC1287 AAA Unknown Unknown ITC
Pisang Klutuk Wulung
ITC1587 balbisiana Unknown Unknown ITC
Poyo
ITC0345 AAA subgr. Cavendish Unknown ITC
Monthan
ITC1483 ABB subgr. Monthan Unknown ITC
Pisang Rajah (South Johnstone)
ITC0587 AAB subgr. Pisang Raja Unknown ITC
Saba
ITC1138 ABB subgr. Saba Unknown ITC
Orishele
ITC1325 AAB subgr. Plantain Nigeria ITC
Red Yade
ITC1140 AAB subgr. Plantain Unknown ITC